BBC's The Century of the Self

The Century of the Self - Full Length Documentary

This British television series, four hours in total, tells the story of how Sigmund Freud's theories about human nature influenced the decisions of the business and political leaders of the last century. Although a highly recommended watch, it is obviously written for separated television broadcast, and it ends up reiterating itself eventually, but it's worth it. You'd never see anything like this on American television, and acclaimed documentarian Adam Curtis explains why with priceless interviews shuffled between jaw-dropping revelations. I watched all four parts in one sitting, but if you don't have the time right away, here are links to the individual episodes:

Part One: Happiness Machines
Part Two: The Engineering of Consent
Part Three: There is a Policeman Inside All Our Heads, He Must Be destroyed
Part Four: Eight People Sipping Wine in Kettering

Adam Curtis made all four episodes free to distribute, and they are also available to watch or download at Archive.Org