The Good Men Project Become a Premium Member We have pioneered the largest worldwide conversation about what it means to be a good man in the 21st century. Your support of our work is inspiring and invaluable. The Truth About XY: The Hazards and Benefits of Being Male: Part 2 We’ll examine the evolutionary roots and causes of male aggression. The Evolution of Sex In Part 1, I looked at what the Corona virus pandemic and the January 6, 2021 attack on the Capitol can teach us about why men are the way they are and how to understand the male tendency to compete with others, form fighting groups, and look for enemies. Here, we’ll examine the evolutionary roots and causes of male aggression.