While I strongly disagree with his opinions about #carob, I feel Jonathan Kauffman really did some great research in creating "Hippie Food: How Back-to-the-Landers, Longhairs, and Revolutionaries Changed the Way We Eat"
I started the book while in grad school, but couldn't finish it due to academic reading. Now that I can read it, I'm just fascinated by the history.
At the very least, it proves that you can make big changes as an individual. Or at least some of us can.