One of the great moral philosophers of the modern age, Peter Singer asks unflinching questions about how we should live our lives. The ideas collected in these writings, arguing that human tyranny over animals is a wrong comparable to racism and sexism, triggered the animal rights movement and gave impetus to the rise in vegan eating.

One of twenty new books in the bestselling Penguin Great Ideas series. This new selection showcases a diverse list of thinkers who have helped shape our world today, from anarchists to stoics, feminists to prophets, satirists to Zen Buddhists.