Europe faces a challenge of identity and international role over the next decade. For nearly 500 years, Europe sat at the center of the international system, its internal competitions rippling out across the globe. But the relative balance of global power and influence has shifted. And rather than being the driving force of global dynamics, Europe is increasingly caught between major powers: the United States and the Soviet Union during the Cold War, and now the United States and China. Internally, Europe still strives for the creation of a continental union, though those dreams have been eroded by financial crises, Brexit and a resurgence of nationalism in recent years. Externally, Europe remains fragmented in its foreign policy and prioritization. The shifting patterns of global competition will compel Europe to rethink its internal structures and to come to grips with defining its interests abroad. Otherwise, it will find itself drifting further...