From the Youtube post:
Dr. Peter Kreeft at the Catholic Diocese of Arlington Men’s Conference 2013 speaking on the greatest supernatural question: the existence of God.
Dr. Peter Kreeft is a professor of philosophy at Boston College and The King’s College. He is the author of numerous books as well as a popular writer of Christian philosophy, theology and apologetics. He also formulated, together with Ronald K. Tacelli, SJ, “Twenty Arguments for the Existence of God.” His intellectual reputation stems from his strengths in debating and summarizing the philosophical arguments of the major Western philosophers. He has debated several academics in issues related to God’s existence. He is a regular contributor to several Christian publications, is in wide demand as a speaker at conferences, and is the author of over 67 books including: Handbook of Christian Apologetics, Christianity for Modern Pagans, and Fundamentals of the Faith.