I realized this this weekend reading his work. He started his career railing against speciesism with his brilliant Animal Liberation. At some point he must have realized that in a world still rife with sexism, racism and classism, the debate over speciesism would have to wait. So his most recent book (The Life You Can Save) is just a plea for us to give a little more of our money to help poor kids. Given how little rich people give, I’m guessing the speciesism debate will come into vogue in 2214.