After fending off Persia in the fifth century BCE, Athens assumed a leadership position in the Aegean world. Initially it led the Delian League, a military alliance against the Persians, but eventually the league evolved into an empire with Athens in control and exacting tribute from its former allies. Athenians justified this subjection of their allies by emphasizing their fairness and benevolence towards them, which gave Athens the moral right to lead. But Athenians also believed that the strong rule over the weak and that dominating others allowed them to maintain their own freedom....