A leading historian's guide to great-power competition, as told through America's successes and failures in the Cold War The United States is entering an era of great-power competition with China and Russia. Such global struggles happen in a geopolitical twilight, between the sunshine of peace and the darkness of war. In this innovative and illuminating book, Hal Brands, a leading historian and former Pentagon adviser, argues that America should look to the history of the Cold War for lessons in how to succeed in great-power rivalry today. Although the threat posed by authoritarian powers is growing, America's muscle memory for dealing with dangerous foes has atrophied in the thirty years since the Cold War ended. In long-term competitions where the diplomatic jockeying is intense and the threat of violence is omnipresent, the United States will need all the historical insight it can get. Exploring how America won a previous twilight struggle is the starting point for determining how America can successfully prosecute another high-stakes rivalry today.