Aeschylus was an ancient Greek tragedian, often described as the father of tragedy. Academic knowledge of the genre begins with his work, and understanding of earlier Greek tragedy is largely based on inferences made from reading his surviving plays. According to Aristotle, he expanded the number of characters in the theatre and allowed conflict among them. Formerly, characters interacted only with the chorus. 525 BC – 456 BC; died at about 69. Alive at the same time as Confucius, The Buddha, Sun Tzu, Socrates, and Sophocles. Wiki link