Philosophers Behaving Badly examines the lives of eight great philosophers—Rousseau, whose views on education and the social order seem curiously at odds with his own outrageous life; Schopenhauer and Nietzsche, two giants of the 19th century whose words seem ever more relevant today; and five immensely influential philosophers of the 20th century, Russell, Wittgenstein, Heidegger, Sartre, and Foucault.