An encyclopedia of World history of World History is one of the world's most famous reference works. More than a million copies have been sold of the first four editions, the last of which dealt with world events down to 1964. For this Fifth Edition Professor Langer had made extensive revisions and added new material bringing the story of man's life on this planet up to January 1, 1971. In this volume, through a miracle of organization and condensation, Professor Langer has succeeded, with th aid of many distinguished scholars in various fields, in setting forth all of human history from the Paleolithic Period to the human history present. An extraordinarily detailed index, itself over 200 pages long, brings that history within reach of the reader's finger tips. The result is a Chronologically aranged reference book indispensable for an age in which history is made from day to day. Here are the movements and the leaders, the victories and defeat, great and small, that have shapped the world . Here, too, are summaries of the cultural activities, the the scientific progress, and the social movements that have made our civilization.