This volume addresses the issue of religion and economy in the evolution of human cooperation. Both religious practices and economic behaviour create and sustain intra-group cooperation by providing people with common goals and values. Even if individuals are selfish maximizers of utility, in the end everybody benefits from being part of a cooperative community, the market. The rules of the market are the invisible hand which turns selfishness into cooperation. In the same way, God beliefs constrain individual selfishness and ensure cooperation within the group.