"Workers of the world, unite!" was the call that issued from the Third International in Moscow in 1920—by which all the participants meant the workers of the industrialized West. Less than half a century later, the torch had passed to the Third World and to the peoples of color in China and Indochina, Africa, and Latin America. This program covers the revolutionary ground from the founding principles of Marx to the election of Salvador Allende in Chile, showing the changing strategies of Communism and the discovery that peasants could replace factory workers in fomenting revolution under the rallying cry of anti-imperialism. Thus the program shows both the goals and the techniques of the international Communist movement. (15 minutes, b&w/color)