What's it about? Invisible Rivalry (2025) explores the interplay between human cooperation and competition. Drawing on multiple disciplines including biology and anthropology, it argues that rather than being purely cooperative or competitive, human motivation is a blend of both. It suggests we address our tendency toward self-interest to help create the best society we can. Do you consider yourself more cooperative or competitive? Selfish or altruistic? What drives us to be generous in some contexts but calculating in others? Think about the last time you split a dinner bill with a friend. Did you pull out your phone’s calculator app to tally your exact share? Or did you wave it off and suggest an even split, even though technically they ordered more? In this lesson, we’ll look at the many varieties of human selfishness and altruism. We’ll find that most of us display a mix of the two. In fact, we’re strategic cooperators, wired to adapt our behavior based on our context, r...