David Mendoza aka Senator Mendoza aka The Mendoza Line aka @superchundy documents the drastic increase in imprisonment rates between 1978 and 2012 in visual form. It's like a kids' flipbook by someone who hated kids and wanted them to be depressed. Click that last link for the full experience but here's a preview:
And it gets even more purple-r! FWIW the national homicide rate fell considerably over the same period. Please use these two data points and your own barely-veiled racial grudges to conduct a civil and respectful debate in the comments.