"Century of the Self" is a great documentary on how the American population has been socially engineered by corporations.
Part 1: http://www.archive.org/details/AdaCurtisCenturyoftheSelf_0 Part 2: http://www.archive.org/details/AdamCurtisCenturyoftheSelfPar... Part 3: http://www.archive.org/details/AdamCurtisCenturyoftheSelfPar... Part 4: http://www.archive.org/details/AdamCurtisCenturyoftheSelfPar...
However, they are in fact some of the most important pieces of film I have ever watched, and Adam Curtis is one of the greatest documentary makers ever.
I encourage you to watch all these, then go and watch all his other works, starting with the Power of Nightmares.