"'In this important, timely, and superblywritten book, Robert Kagan shows that the "end of history" was an illusion. Today's global challenges pose a stern test for the world's democracies. This book is a wake-up call and should be read by policymakers, politicians, pundits and all who want a guide to the dangerous waters of 21st century geopolitics.' Senator John McCain 'Robert Kagan is the reigning pundit of great power politics.' TLS 'Subtle and deep' Economist 'A book demanding to be read' Independent 'Essential reading' Spectator 'Kagan does big-picture thinking in a way that eludes his British counterparts'. Observer"