This is a video of Robert Sapolsky, professor of neurology, neurological sciences, neurosurgery and biological sciences, speaking on commencement weekend at Stanford University in 2009. Professor Sapolsky demonstrates the best way to understand human behavior is to study animal behavior. It’s long, but I found the professor engaging and the subject matter fascinating. If you want to know why you do the things you do, watch this video. The title of this post is basically the message of his presentation.