The Rules That Make Us by Oliver Sweet How Culture Shapes the Way We Act, Think, Believe, and Buy
What's it about?
The Rules That Make Us (2026) makes the case that culture, not psychology alone, explains why people act, think, and buy the way they do. Drawing on real-world case studies from business and public health, it offers a practical model for recognizing cultural forces, and using them to drive personal and social change.
You’ve made hundreds of decisions today, and you probably think every one of them came from you: your taste, your morals, your choices. But that’s not entirely true. Your identity, what you think is right or wrong, how you behave at home or in public – none of these are entirely up to you. They’re quietly shaped by something that operates underneath.
Something that influences what feels normal, safe, and right. That invisible force has a name – culture – and once you learn to see it, you’ll start noticing it everywhere: in your home, your workplace, and even your own habits. This lesson is a short guide to spotting the hidden rules steering your life, and learning how to work with them instead of against them. You live inside a strange contradiction, though you may not have noticed it.
To understand why you do the things you do, you turn to psychology to analyze your thoughts, feelings, and moods. When you want to understand the world, you likely apply that same knowledge to others, analyzing their behaviors or motives the same way. Psychology appears to be the only tool that exists for understanding human society. Self-help books fly off shelves.
Terms once heard only in clinical offices – like setting boundaries, avoiding triggers, or protecting your peace – now show up in casual conversation. Psychology has quietly grown from a tool for healing individual minds into the default lens for understanding entire societies, including politics and business. But psychology wasn’t designed for that, and the consequences of applying it to society have been more damaging than you might think. In 2016, political campaigns in both the United Kingdom and the United States used psychological profiling to sort millions of voters into personality categories, then aimed a different message at each group. It was the first time a campaign could promise one thing to one type of voter and something else entirely to another, all within the same election. Many researchers link this approach to the sharper political division that followed, since it trained people to see politics as a personal battle of identities rather than a shared civic project.
There’s another way to understand why you do what you do, and it starts from a completely different place. Anthropology is the study of human culture: the shared rules and habits that grow out of where and how you live. While psychology starts inside yourself, anthropology begins outside you, in the social systems into which you were born. Like a child learning exactly how close to stand to a stranger, without ever being told. Or when silence is respectful and when it’s rude. That child never chose those rules.
She absorbed them the way she absorbed her native language: by growing up inside them. Consider two children born in the same year. One grows up in Manhattan, the other in a rural village in the mountains near Cusco, Peru. Their brains work the same way, biologically speaking. But their languages, family structures, religions, and access to money and opportunity are so vastly different that psychology alone can’t explain who they’ll become. You don’t even need to travel that far to see the same force at work.
A child raised in public housing in the Bronx and one raised in a penthouse a few miles away on the Upper East Side will grow up with entirely different rules about safety, ambition, and what counts as success. Culture is the operating system running underneath every choice you make. Psychology can tell you what’s happening inside your head, but only culture can tell you why. If you want to understand the real forces shaping who you think you are and why you do what you do, don’t just decode yourself, decode your culture.
Ask the average person to define culture and you’ll get a pretty vague response. They might talk about art or literature or movies, but won’t have the vocabulary to describe how culture operates. That’s partly because culture is absorbed as we grow, not taught like history or mathematics. It’s like asking a fish to describe living in water when it’s never known anything else.
Culture works much the same way. To start bringing it into focus, think of culture as three pillars holding up everything you do. The first pillar is your identity: who you are and how you show that to the world. Identity governs things like the clothes you choose to express your style, or the traditions you keep alive without question. But that identity isn’t fixed. It shifts as your experiences change, as the people around you change, and as the expectations placed on you by others change.
For instance, your patterns of speech, habits, and behavior might change when you become a parent. The second pillar is who you belong to, the people whose approval you seek and whose norms you absorb and reflect. Think about a friend group that’s spent years together, and how quickly you can sense its unwritten rules the moment you join a gathering. Maybe complaining about work is welcome, but complaining about a partner is not. Arriving 15 minutes late might be normal, but showing up empty-handed isn’t. Nobody wrote these rules down; you picked them up simply by watching what earned approval and what received awkward silence.
That’s community at work: quietly training you on what it takes to belong. The third pillar is shared values, or what you believe determines right from wrong. One community may value rugged individualism, for instance, while another sees self-sacrifice as the ultimate good. This pillar includes morality and religious beliefs, and deeply influences individual identity by telling you what it takes to be a good person. On their own, each pillar tells you something. But standing together, and shifting together, they uphold almost every decision an individual, or an entire community, will ever make.
To understand this in action, imagine a beverage company preparing to launch an energy drink into a new market: a country it’s never sold in before. Executives study this new market’s data. They know the age range they want to target, their income bracket, even the flavor profile locals tend to prefer. The campaign they build is bold, individualistic, built around a single athlete pushing through exhaustion to win a marathon alone. It performs beautifully in focus groups back home. In the new market?
Sales don’t budge. That’s because the company considered metrics but not culture. In this market, achievement was never framed as something a person earns alone. It was something a family or a whole community earns together, so an ad celebrating solitary triumph quietly insulted the values of the very people it was trying to reach.
The three pillars of culture won’t always be visible on the surface, but they’re always operating underneath. Learn to spot them, and behavior that once looked confusing starts making a great deal more sense. Are you one of the countless people who tried to quit smoking, start exercising, or stop procrastinating, armed with nothing but good intentions and willpower?
Sadly, you may also have watched that willpower crumble the moment you were back in the same room, or with the same people, where your original behavior was accepted as normal. That collapse isn’t personal: it’s a clue about where change really comes from. Change rarely begins purely in your head. It starts in the space between you and the world around you.
Someone who’s sworn off cigarettes can hold that resolve for weeks, right up until an old smoking friend offers one on a night out. Willpower operates on identity, but identity is constantly being pulled by community and beliefs, whether you notice it happening or not. But once you see identity, community, and belief as three forces constantly acting on each other, you can harness that motion instead of fighting it. Consider how becoming a parent changes a person. It rarely starts with a sudden shift in values or beliefs, but with an identity change: you’re suddenly seen, and see yourself, as someone’s parent. That new identity pulls you toward a new community almost automatically, like other parents, playgroups, or family gatherings built around children.
Spend enough time inside that community and its norms start reshaping your beliefs about what matters, what’s worth worrying over, what you believe a good life looks like. One shift in identity quietly drags the other two pillars along behind it. The same pattern explains why surrounding yourself with the right people works better than most self-help advice will admit. Someone determined to become more disciplined, for instance, will find it easier if they act disciplined and surround themselves with disciplined people, even before they really believe it about themselves. Act like a driven person long enough, inside a community that expects that behavior from you, and the identity stops feeling like a performance. It becomes real, because belief eventually catches up to the identity and community already holding it in place.
But this pattern can work against you just as easily. It explains why people who fall into trouble even briefly can struggle to leave it behind. A minor mistake earning someone a criminal record can hand them a new identity, one built on shame and exclusion. Believing that identity is now fixed can push someone toward the community and behavior that inhabits that identity, making the original mistake more likely to repeat itself. You aren’t one fixed self, fighting to control your behavior through sheer force alone. You are three constantly shifting forces that pull on each other in real time.
So if you want to change something in your life, stop asking what you believe or how much willpower you have. Ask which of the three pillars is easiest to move first. Change your identity, even in a small, deliberate way, and community and belief will start following. Change who you spend your time with, and your identity and beliefs will start changing to match. In this way, you aren’t just changing a habit, but quietly rearranging the whole structure holding your behavior in place.
Harnessing the three pillars of culture can help you drive personal change, but some problems are too large to solve one person at a time. One international disease outbreak revealed some striking insights into why. When Ebola swept through several countries in West Africa in 2014, the initial response looked like a military operation. Soldiers moved through villages quickly isolating the sick and removing the bodies of the dead, following standard Western public health protocols.
The result was chaos. Patients fled from treatment centers. Some communities violently attacked the troops sent to help them. Families secretly dug up buried bodies so they could perform proper funeral rites, exposing themselves to infection while honoring their dead. The disease kept spreading until a different kind of team arrived. Instead of enforcing rules from outside, they started by asking why the community was resisting the help that was meant to save them.
What they found had nothing to do with ignorance. Troops removing family members echoed a painful colonial history that still lived in memory. Local healers and local knowledge were being dismissed entirely. And every instruction was arriving as a command from outsiders, never as something the community had a hand in shaping. Once that became clear, the response changed completely. Treatment tents were given clear walls so families could see their relatives being cared for.
Scary hazmat suits were swapped for local gear, and families were allowed to carry their own dead to burial under the guidance of village elders who could still keep everyone safe. None of this was included in standard protocols, but all of it worked because it treated grief and ritual as essential to stopping the virus, not as inconveniences standing in the way. You might assume a lesson this clear would stick. It did not. When another global pandemic arrived years later – COVID-19 – wealthy nations repeated the same mistake. Health officials debated mask wearing almost entirely through an individual lens, weighing personal risk against personal liberty.
They missed what a mask actually communicated to their neighbors. In places where mask wearing was a shared expectation, people described feeling like they were facing danger together and wore masks enthusiastically as a way to take care of their community. This is the real lesson: when a crisis is genuinely collective, a purely individual solution will always fall short, no matter how sound the science behind it looks on paper. You may never manage a pandemic response or negotiate with an entire village, but the same forces for change are available to you at a much smaller scale. If you want to confront bias, for instance, don’t stop at correcting your own private thinking. Change who you surround yourself with, since a community that expects equality will quietly pull your identity and beliefs along with it.
If you want to make a space more inclusive, look at what identities that space currently welcomes and which ones it quietly excludes, then work on the welcome first. And if you’re trying to build something larger – a movement, an organization, a simple change in your own neighborhood – remember that lasting change rarely arrives as a single announcement. It spreads the way culture always spreads, through identity, community, and belief, each one quietly reshaping the other two, until what once felt impossible starts to look like common sense.
In this lesson to The Rules That Make Us by Oliver Sweet, you’ve learned that your choices were never purely your own, they were shaped by culture, working quietly through three pillars: identity, community, and belief. Identity is who you are and how you show it, and shifts depending on where you stand and who’s watching. Community is who you belong to, the unwritten rules you absorb by spending time among people whose approval you seek. Belief is what you’ve understood to be right, valuable, and worth pursuing; the compass guiding your biggest choices.
These pillars constantly move each other, which explains why real change, both personal and societal, rarely comes from willpower alone but from understanding which pillar to move first, and consciously moving it.
The Rules That Make Us (2026) makes the case that culture, not psychology alone, explains why people act, think, and buy the way they do. Drawing on real-world case studies from business and public health, it offers a practical model for recognizing cultural forces, and using them to drive personal and social change.
You’ve made hundreds of decisions today, and you probably think every one of them came from you: your taste, your morals, your choices. But that’s not entirely true. Your identity, what you think is right or wrong, how you behave at home or in public – none of these are entirely up to you. They’re quietly shaped by something that operates underneath.
Something that influences what feels normal, safe, and right. That invisible force has a name – culture – and once you learn to see it, you’ll start noticing it everywhere: in your home, your workplace, and even your own habits. This lesson is a short guide to spotting the hidden rules steering your life, and learning how to work with them instead of against them. You live inside a strange contradiction, though you may not have noticed it.
To understand why you do the things you do, you turn to psychology to analyze your thoughts, feelings, and moods. When you want to understand the world, you likely apply that same knowledge to others, analyzing their behaviors or motives the same way. Psychology appears to be the only tool that exists for understanding human society. Self-help books fly off shelves.
Terms once heard only in clinical offices – like setting boundaries, avoiding triggers, or protecting your peace – now show up in casual conversation. Psychology has quietly grown from a tool for healing individual minds into the default lens for understanding entire societies, including politics and business. But psychology wasn’t designed for that, and the consequences of applying it to society have been more damaging than you might think. In 2016, political campaigns in both the United Kingdom and the United States used psychological profiling to sort millions of voters into personality categories, then aimed a different message at each group. It was the first time a campaign could promise one thing to one type of voter and something else entirely to another, all within the same election. Many researchers link this approach to the sharper political division that followed, since it trained people to see politics as a personal battle of identities rather than a shared civic project.
There’s another way to understand why you do what you do, and it starts from a completely different place. Anthropology is the study of human culture: the shared rules and habits that grow out of where and how you live. While psychology starts inside yourself, anthropology begins outside you, in the social systems into which you were born. Like a child learning exactly how close to stand to a stranger, without ever being told. Or when silence is respectful and when it’s rude. That child never chose those rules.
She absorbed them the way she absorbed her native language: by growing up inside them. Consider two children born in the same year. One grows up in Manhattan, the other in a rural village in the mountains near Cusco, Peru. Their brains work the same way, biologically speaking. But their languages, family structures, religions, and access to money and opportunity are so vastly different that psychology alone can’t explain who they’ll become. You don’t even need to travel that far to see the same force at work.
A child raised in public housing in the Bronx and one raised in a penthouse a few miles away on the Upper East Side will grow up with entirely different rules about safety, ambition, and what counts as success. Culture is the operating system running underneath every choice you make. Psychology can tell you what’s happening inside your head, but only culture can tell you why. If you want to understand the real forces shaping who you think you are and why you do what you do, don’t just decode yourself, decode your culture.
Ask the average person to define culture and you’ll get a pretty vague response. They might talk about art or literature or movies, but won’t have the vocabulary to describe how culture operates. That’s partly because culture is absorbed as we grow, not taught like history or mathematics. It’s like asking a fish to describe living in water when it’s never known anything else.
Culture works much the same way. To start bringing it into focus, think of culture as three pillars holding up everything you do. The first pillar is your identity: who you are and how you show that to the world. Identity governs things like the clothes you choose to express your style, or the traditions you keep alive without question. But that identity isn’t fixed. It shifts as your experiences change, as the people around you change, and as the expectations placed on you by others change.
For instance, your patterns of speech, habits, and behavior might change when you become a parent. The second pillar is who you belong to, the people whose approval you seek and whose norms you absorb and reflect. Think about a friend group that’s spent years together, and how quickly you can sense its unwritten rules the moment you join a gathering. Maybe complaining about work is welcome, but complaining about a partner is not. Arriving 15 minutes late might be normal, but showing up empty-handed isn’t. Nobody wrote these rules down; you picked them up simply by watching what earned approval and what received awkward silence.
That’s community at work: quietly training you on what it takes to belong. The third pillar is shared values, or what you believe determines right from wrong. One community may value rugged individualism, for instance, while another sees self-sacrifice as the ultimate good. This pillar includes morality and religious beliefs, and deeply influences individual identity by telling you what it takes to be a good person. On their own, each pillar tells you something. But standing together, and shifting together, they uphold almost every decision an individual, or an entire community, will ever make.
To understand this in action, imagine a beverage company preparing to launch an energy drink into a new market: a country it’s never sold in before. Executives study this new market’s data. They know the age range they want to target, their income bracket, even the flavor profile locals tend to prefer. The campaign they build is bold, individualistic, built around a single athlete pushing through exhaustion to win a marathon alone. It performs beautifully in focus groups back home. In the new market?
Sales don’t budge. That’s because the company considered metrics but not culture. In this market, achievement was never framed as something a person earns alone. It was something a family or a whole community earns together, so an ad celebrating solitary triumph quietly insulted the values of the very people it was trying to reach.
The three pillars of culture won’t always be visible on the surface, but they’re always operating underneath. Learn to spot them, and behavior that once looked confusing starts making a great deal more sense. Are you one of the countless people who tried to quit smoking, start exercising, or stop procrastinating, armed with nothing but good intentions and willpower?
Sadly, you may also have watched that willpower crumble the moment you were back in the same room, or with the same people, where your original behavior was accepted as normal. That collapse isn’t personal: it’s a clue about where change really comes from. Change rarely begins purely in your head. It starts in the space between you and the world around you.
Someone who’s sworn off cigarettes can hold that resolve for weeks, right up until an old smoking friend offers one on a night out. Willpower operates on identity, but identity is constantly being pulled by community and beliefs, whether you notice it happening or not. But once you see identity, community, and belief as three forces constantly acting on each other, you can harness that motion instead of fighting it. Consider how becoming a parent changes a person. It rarely starts with a sudden shift in values or beliefs, but with an identity change: you’re suddenly seen, and see yourself, as someone’s parent. That new identity pulls you toward a new community almost automatically, like other parents, playgroups, or family gatherings built around children.
Spend enough time inside that community and its norms start reshaping your beliefs about what matters, what’s worth worrying over, what you believe a good life looks like. One shift in identity quietly drags the other two pillars along behind it. The same pattern explains why surrounding yourself with the right people works better than most self-help advice will admit. Someone determined to become more disciplined, for instance, will find it easier if they act disciplined and surround themselves with disciplined people, even before they really believe it about themselves. Act like a driven person long enough, inside a community that expects that behavior from you, and the identity stops feeling like a performance. It becomes real, because belief eventually catches up to the identity and community already holding it in place.
But this pattern can work against you just as easily. It explains why people who fall into trouble even briefly can struggle to leave it behind. A minor mistake earning someone a criminal record can hand them a new identity, one built on shame and exclusion. Believing that identity is now fixed can push someone toward the community and behavior that inhabits that identity, making the original mistake more likely to repeat itself. You aren’t one fixed self, fighting to control your behavior through sheer force alone. You are three constantly shifting forces that pull on each other in real time.
So if you want to change something in your life, stop asking what you believe or how much willpower you have. Ask which of the three pillars is easiest to move first. Change your identity, even in a small, deliberate way, and community and belief will start following. Change who you spend your time with, and your identity and beliefs will start changing to match. In this way, you aren’t just changing a habit, but quietly rearranging the whole structure holding your behavior in place.
Harnessing the three pillars of culture can help you drive personal change, but some problems are too large to solve one person at a time. One international disease outbreak revealed some striking insights into why. When Ebola swept through several countries in West Africa in 2014, the initial response looked like a military operation. Soldiers moved through villages quickly isolating the sick and removing the bodies of the dead, following standard Western public health protocols.
The result was chaos. Patients fled from treatment centers. Some communities violently attacked the troops sent to help them. Families secretly dug up buried bodies so they could perform proper funeral rites, exposing themselves to infection while honoring their dead. The disease kept spreading until a different kind of team arrived. Instead of enforcing rules from outside, they started by asking why the community was resisting the help that was meant to save them.
What they found had nothing to do with ignorance. Troops removing family members echoed a painful colonial history that still lived in memory. Local healers and local knowledge were being dismissed entirely. And every instruction was arriving as a command from outsiders, never as something the community had a hand in shaping. Once that became clear, the response changed completely. Treatment tents were given clear walls so families could see their relatives being cared for.
Scary hazmat suits were swapped for local gear, and families were allowed to carry their own dead to burial under the guidance of village elders who could still keep everyone safe. None of this was included in standard protocols, but all of it worked because it treated grief and ritual as essential to stopping the virus, not as inconveniences standing in the way. You might assume a lesson this clear would stick. It did not. When another global pandemic arrived years later – COVID-19 – wealthy nations repeated the same mistake. Health officials debated mask wearing almost entirely through an individual lens, weighing personal risk against personal liberty.
They missed what a mask actually communicated to their neighbors. In places where mask wearing was a shared expectation, people described feeling like they were facing danger together and wore masks enthusiastically as a way to take care of their community. This is the real lesson: when a crisis is genuinely collective, a purely individual solution will always fall short, no matter how sound the science behind it looks on paper. You may never manage a pandemic response or negotiate with an entire village, but the same forces for change are available to you at a much smaller scale. If you want to confront bias, for instance, don’t stop at correcting your own private thinking. Change who you surround yourself with, since a community that expects equality will quietly pull your identity and beliefs along with it.
If you want to make a space more inclusive, look at what identities that space currently welcomes and which ones it quietly excludes, then work on the welcome first. And if you’re trying to build something larger – a movement, an organization, a simple change in your own neighborhood – remember that lasting change rarely arrives as a single announcement. It spreads the way culture always spreads, through identity, community, and belief, each one quietly reshaping the other two, until what once felt impossible starts to look like common sense.
In this lesson to The Rules That Make Us by Oliver Sweet, you’ve learned that your choices were never purely your own, they were shaped by culture, working quietly through three pillars: identity, community, and belief. Identity is who you are and how you show it, and shifts depending on where you stand and who’s watching. Community is who you belong to, the unwritten rules you absorb by spending time among people whose approval you seek. Belief is what you’ve understood to be right, valuable, and worth pursuing; the compass guiding your biggest choices.
These pillars constantly move each other, which explains why real change, both personal and societal, rarely comes from willpower alone but from understanding which pillar to move first, and consciously moving it.
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