The Century of the Self:

I downloaded it in four parts one week and watched each one by itself on different nights. As some of you may be aware, I have been struggling with a sleeping problem, essentially its consistency. That week however, was different. Each night that I played the film, I fell asleep quick and easily. I felt refreshed each morning after, too.

Putting my own problems aside, I strongly recommend The Century of the Self. It is very interesting and the best depiction of mass psychology I have ever seen.