It’s perfectly human to grapple with questions, like ‘Where do we come from?’ and ‘How do I live a life of meaning?’ These existential questions are central to the five major world religions — and that’s not all that connects these faiths. John Bellaimey explains the intertwined histories and cultures of Hinduism, Judaism, Buddhism, Christianity and Islam. Need more proof on their intertwined history? Just watch Zeitgeist.