Soon after Philip's death in 336 B.C., Aristotle returned to Athens, where he founded the Lyceum. It was here that he undertook his most important work, and many of his surviving writings were based on lectures prepared for the school. Much of his work has not been dated precisely, and he was constantly revising much of it. Moreover, we know little about his life apart from this work, and hence this biography is organized around the works themselves. His greatest achievement is generally considered to be the syllogism, which helped to launch the field of logic–a field that Aristotle essentially created single-handedly. Logic was the fundamental tool that made all understanding and learning possible, for it helped one to recognize when proof was necessary and how to evaluate such proof. After logic, Aristotle's contributions to biology are among his most significant. He
This is the end of the preview. Sign up
access the rest of the document.