„To be honest, I was somewhat disappointed... It's had effects around the margins, of course, but they have mostly been minor. When I wrote it, I really thought the book would change the world. I know it sounds a little grand now, but at the time the sixties still existed for us. It looked as if real changes were possible, and I let myself believe that this would be one of them. All you have to do is walk around the corner to McDonald's to see how successful I have been.“
— Peter Singer Australian philosopher 1946
Quoted by Michael Specter on the impact of the book Animal Liberation, " The Dangerous Philosopher http://www.michaelspecter.com/1999/09/the-dangerous-philosopher/", The New Yorker, 6 September 1999.