If you can’t believe in something beyond this life, you’ll struggle to make sense of things here and now. In his 11th thesis in his famous “Theses on Feuerbach” (1888), Karl Marx famously said, “The philosophers have only interpreted the world, in various ways. The point, however, is to change it.” This phrase has been interpreted in several ways by both Marx’s critics and his fans, but one salient reading is that Marx saw philosophy leading fundamentally toward revolutionary change. For earlier Marxists, the goal was principally economic (although the early seeds of the sexual and cultural revolution were sown...