The brain is a wonderful yet incredibly complicated thing, which scientists are still seeking to fully understand. This short video, then, provides a whistlestop tour of the current state of psychology—the study of our complex mental functions and behaviors.

Do we have free will, or are we driven by our environment and biology? Why do people do bad things? What can we do about mental illness? They're just some of the massive questions that face psychologists. Starting with Freud and zipping right through to modern experimental psychology, this video explains why it's such a rich, diverse and complicated field that we should all know just a little more about. [Crash Course]