Lectures given at University of Pennsylvania, McGill University, and the University of Puerto Rico, 1961-62.

[1.]The present-day experiment in Western civilization: -- Light from the past: the experiment in Hellenization -- The attraction of the Western way of life -- Parliamentary democracy on trial -- [2.] America and the world revolution: -- The shot heard around the world -- The handicap of affluence -- Can America re-join her own revolution -- [3.] The economy of the Western hemisphere: -- The Western hemisphere in a changing world -- The present revolution in Latin America -- The problem for the United States.