Augustine of Hippo, the fifth century bishop in North Africa, theologian and philosopher, was the most significant thinker in western history from Plato in ancient Greece to Thomas Aquinas in medieval Europe. His imagination moved across a vast canvas and in his writings he discussed all the great questions human beings have discussed for centuries, freedom and determinism, how does one know, what is the highest good (summum bonum), what makes human beings unique, what kind of a being is God, how did the world come to be, how does one account for evil, what is the place of the affections in the moral life, the meaning of time and of memory. The lecture will briefly discuss Augustine's intellectual contributions and then focus on three groups of writings that deal with perennial questions: the nature of marriage, lying and human speech, the Church and the political order. BIO: Dr. Robert Wilken is a professor of the History of Christianity at the University of Virginia in Charlottesville. He holds a PhD in the History of Christianity from the University of Chicago and serves as the Chairman of the Board for both the St. Anselm Institute for Catholic Thought as well as the Center for Catholic and Evangelical Theology. He is the author of several books including The Spirit of Early Christian Thought: Seeking the Face of God (Yale University Press, 2003), which has been translated into several languages, and Remembering the Christian Past (William B. Eerdmans Publishing Co, 1995).