Paul Rand, Anti-War, Pro-Typography
(Find me at 50 Watts Books.)
Paul Rand, poster against war, 1968
Here's a quick post of Paul Rand designs. You should check out the Paul Rand modern design fan club on flickr. (And while you are at it, visit Scott Lindberg's Alvin & Elaine Lustig Group.)
I just splurged on a recently out-of-print book of his work, so I should know a lot more about the man in a couple weeks. (Note that Steven Heller's Phaidon book Paul Rand is in print.)