The idea that it is morally wrong to eat animals held sway for about one thousand years among some of the most prominent ancient Greek philosophers, including Pythagoras, Empedocles, Theophrastus, Plotinus, Plutarch, Porphyry, and, perhaps, Plato. The idea then died out for almost seventeen-hundred years. Since the 1970s, however, there has been a resurgence of interest in vegetarianism, marked by lively debates and the emergence of a substantial literature in the form of scholarly books and articles.
