veganism: I nominate Jon Robbins.|||Peter Singer. Singer is an act utilitarian, or more specifically a preference utilitarian, meaning that he judges the rightness of an act by its consequences, and specifically by the extent to which it satisfies the preferences of those affected, maximizing pleasure and minimizing pain.|||I really like Johnathan Fodor, who wrote Eating Animals (and also Everything Is Illuminated, but that has nothing to do with vegetarianism). His book is compelling but also accessible. He doesn't shy away from the truth about factory farms but presents it without using a lot of gore.