The Russian-Ukraine conflict intensifies with each passing day. Negotiations move at a slow pace while weapons and military assistance from other nations pour into Ukraine. Some commentators talk about “just war.” Russia threatens to use nuclear weapons. This seminar will explore the questions, attitudes, and conditions for building a better world raised in Pope Francis’s encyclical Fratelli Tutti. The question of the validity of the traditional “Just War Theory” in a nuclear era must be challenged.