It is the most persistent myth of our time: religion is the cause of all violence. But history suggests otherwise. Karen Armstrong, former Roman Catholic nun and one of our foremost scholars of religion, speaks out to disprove the link between religion and bloodshed.Religion is as old as humanity: Fields of Blood goes back to the Stone Age hunter-gatherers and traces religion through the centuries, from medieval crusaders to modern-day jihadists.The West today has a warped concept of religion: we regard faith as a personal and private matter, but for most of history faith has informed people's entire outlook on life, and often been inseparable from politics.Humans undoubtedly have a natural propensity for aggression: the founders of the largest religions - Jesus, Buddha, the rabbis of early Judaism, the prophet Muhammad - aimed to curb violence and build a more peaceful and just society, but with our growing greed for money and wealth came collective violence and warfare.With the arrival of the modern all-powerful, secular state humanity's destructive potential has begun to spiral out of control. Is humanity on the brink of destroying itself?