Reading Time: 5 minutesThis is the 2024 version of Robert Sapolsky’s human behavioral course at Stanford University. This is lecture 2: Evolution of behaviour. For the first lecture, go to my profile. again, **Disclaimer:** This essay is a simplified interpretation of *Lecture 2: Evolution of Behavior* by Robert Sapolsky. It is **not a substitute for attending the actual lecture or studying the full course material**. For a deeper understanding, please refer to the original lecture and resources. # Why Do We Help, Compete, or Cheat? Human behavior often feels confusing. Sometimes we help others, sometimes we compete, and sometimes we act selfishly. So what actually drives our actions? In this…