This book is written for the key stage 3 history unit: the twentieth century world is an extension of The Second World War by the same author. Historical coverage extends from a view of the world at the turn of the century, through the upheavals of the First and Second World Wars to the present day. Students are given an overview of the main events and developments of the twentieth century, and are introduced to issues of political, economic and social importance.The book also includes particular depth studies.