Peter Kropotkin was surely on the left. He was one of the founders of what is now called 'sociobiology' or 'evolutionary psychology' with his book Mutual Aid, arguing that human nature had evolved in ways conducive to the communitarian anarchism that he espoused.
Noam ChomskyIf something is right (or wrong) for us, it’s right (or wrong) for others. It follows that if it’s wrong for Cuba, Nicaragua, Haiti, and a long list of others to bomb Washington and New York, then it’s wrong for Rumsfeld to bomb Afghanistan (on much flimsier pretexts), and he should be brought before war crimes trials.
Noam ChomskyThe Iraq War was the first conflict in western history in which an imperialist war was massively protested against before it had even been launched.
Noam ChomskyIn the years of the Reagan-Bush administration alone, about 1.5 million people were killed by South Africa just in the surrounding countries. Forget what was happening in South Africa and Namibia.
Noam ChomskyFor thirty years, Isreal has been highjacking ships in international waters, killing people, taking hostages, bringing them to Israel, putting them in secret prisons, all with the help of the United States. That's serious piracy.
Noam ChomskyThere are a lot of people that form movements around particular commitments, like gay rights. It is important, but it does not link easily to, say, economic rights, and it often looks like it's opposed to them. The attempt to bring these together has yet to be done in a truly effective way, and I think it can be.
Noam Chomsky