Today I watched the docomentry "In Pot We Trust". I thought it conveyed a strong sense of how the political system gets in the way of people (legally) having happy lives and how the whole brutal war is fought over blind asumptions.
 
If you want to watch it: watch it online at (no bullshit web site stuff just the film)= http://www.phillynorml.org/videos/aaf-ipwt.avi ; or find a site that can download internet videos for you (as I did, it was only 250mb approx).