Joel Salatin has a well deserved reputation as an activist for organic farming specifically, and Christian libertarianism specifically.
Well deserved, I say, because he practices what he preaches, and has done so for a long time.
Well deserved, I say, because, although I do not know him personally, a close relative of mine spent a week at his holistically-minded organic farm in the Shenandoah Valley of Virginia several years ago, and brought me up-to-speed (more or less) on what committed, intelligent, counter-industrial-farming guys are accomplishing here and there, and what they are up against. (In a word, they are up against a powerful phalanx of corporate warriors determined to control agriculture, focusing on America. They are in the end-game here, and they are already dominant in much of the rest of the food-producing world.)
Joel Salatin recently had an interaction with the US Secretary of Agriculture, and heard him say — well, read it for yourself here.