Plato

Plato, born in Athens around 427 BC, was considered to be one of the earliest philosophers. He lived during the Age of Synthesis. After his father's death his mother married a friend of Pericles so he was politically connected to both the oligarchy and democracy. After the Peloponnesian War, his mother's brother and uncle tried to persuade him to join in the oligarchical rules of Athens. Instead, Plato joined his two older brothers in becoming a student of Socrates. Socrates forced them to challenge then to examine their ideas and beliefs critically, which was annoying and antagonizing many in the process. Socrates seems to have adopted as his own the motto of the Delphic Oracle, "Know thyself"; and, while trying to dissociate himself from the sophists' brand of instruction for hire, he taught his students that, "it is the greatest good for a man to discuss virtue every day and those other things about which you hear me conversing and testing myself and others, for the unexamined life is not worth living."

Plato was an opponent of the relativism and scepticism of the Sophists; but, like them he focused on values rather than on physical science. Aristotle credits Socrates with emphasizing moral questions and precise definitions; and Plato surely absorbed these lessons.

Plato was no friend of the Thirty Tyrants, who's reign (404-403 BC) lasted only 8 months, but he also was not a friend of the Athenian democracy when it was restored. He alienated them by him method of critical interrogation. In 399 BC he was brought to trial with the capital crimes of religious impiety and corruption of youth, convicted, and sentenced to death. Hid friends offered to pay a fine instead of the death penalty. As Plato tells us in the Seventh Letter after Socrates' death, he became disenchanted with all existing political regimes, and felt that the only salvation of politics would require that "either true and genuine philosophers attain political power or the rulers of states by some dispensation