In his native Athens in the early 410s BC, he advocated an aggressive foreign policy and was a prominent proponent of the Sicilian Expedition, but he fled to Sparta after his political enemies brought charges of sacrilege against him.
Na súa Atenas nativa, a principios dos anos 410 a. C., defendeu unha política exterior agresiva e foi un destacado defensor da expedición a Sicilia, pero fuxiu a Esparta cando os seus inimigos políticos presentaron cargos de sacrilexio contra el.