how the setting influence the characters in oedipus rex ?

The play's action occurs outside Oedipus's palace in Thebes. Thebes had been founded, according to the myth, by Cadmus (a son of Agenor, King of Phoenicia) while searching for his sister Europa, who had been abducted by Zeus in the form of a bull. A direct line of descent can be traced from Cadmus to Oedpius; between them are Polydorus, Labdacus, and, of course, Laius.