Thomas Aquinas (1224/6-1274) was first and foremost a Christian theologian. Yet he was also one of the greatest philosophers of the Middle Ages. Drawing on classical authors, and incorporating ideas from Jewish and Arab sources, he came to offer a rounded and lasting account of the origin of the universe and of the things to be found within it, especially human beings.Aquinas wrote many works, but his greatest achievement is undoubtedly the Summa Theologiae. This presents ...