Greek and Roman mythology are both ancient belief systems of the Mediterranean world, and there are many gods and ideas that overlap. However, Greek mythology often focuses on the relationship between humans and the gods, with many stories centering around the interactions between heroes and gods. In contrast, Roman mythology tends to be more pragmatic and places greater emphasis on the power of the state and civic duty. For example, the Greek god Zeus is seen as a powerful and capricious figure, while the Roman god Jupiter is depicted as more level-headed and judicious.