Now in its fourth edition, this highly successful global history of the twentieth century is written by four prominent international historians for first-year undergraduate level and upward. Using their thematic and regional expertise, the authors have produced an authoritative yet accessible and seamless account of the history of international relations in the last century, covering events in Europe, Asia, the Middle East, Africa and the Americas.They focus on the history of relations between states and on the broad ideological, economic and cultural forces that have influenced the evolution of international politics over the last 120 years.The fourth edition is thoroughly updated to take account of the most recent research and global developments, including new material on the impact of the Trump administration on international politics, the rise of China under the leadership of Xi Jinping and the origins of the wars in Ukraine and Gaza. The book is supported by a fully revised companion website including links to further resources and self-testing material, which can be found at www.routledgelearning.com/internationalhistory20c.