One of the most important questions of human existence is what drives nations to war—especially massive, system-threatening war. Much military history focuses on the who, when, and where of war. In this riveting book, Dale C. Copeland brings attention to bear on why governments make decisions that lead to, sustain, and intensify conflicts.Copeland presents detailed historical narratives of several twentieth-century cases, including World War I, World War II, and the Cold War. He highlights instigating factors that transcend individual personalities, styles of government, geography, and historical context to reveal remarkable consistency across several major wars usually considered dissimilar. The result is a series of challenges to established interpretive positions and provocative new readings of the causes of conflict.Classical realists and neorealists claim that dominant powers initiate war. Hegemonic stability realists believe that wars are most often started by rising states. Copeland offers an approach stronger in explanatory power and predictive capacity than these three brands of realism: he examines not only the power resources but the shifting power differentials of states. He specifies more precisely the conditions under which state decline leads to conflict, drawing empirical support from the critical cases of the twentieth century as well as major wars spanning from ancient Greece to the Napoleonic Wars.

This analysis of the origins of major wars, since the development of the modern state system in Europe centuries ago, also considers the problems involved in preventing a contemporary nuclear war.

Pioneering study of the transition from war to peace and the birth of humanitarian rights after the Great War.

The catastrophe of the First World War, and the destruction, revolution, and enduring hostilities it wrought, make the issue of its origins a perennial puzzle. Since World War II, Germany has been viewed as the primary culprit. Now, in a major reinterpretation of the conflict, Sean McMeekin rejects the standard notions of the war’s beginning as either a Germano-Austrian preemptive strike or a “tragedy of miscalculation.” Instead, he proposes that the key to the outbreak of violence lies in St. Petersburg. It was Russian statesmen who unleashed the war through conscious policy decisions based on imperial ambitions in the Near East. Unlike their civilian counterparts in Berlin, who would have preferred to localize the Austro-Serbian conflict, Russian leaders desired a more general war so long as British participation was assured. The war of 1914 was launched at a propitious moment for harnessing the might of Britain and France to neutralize the German threat to Russia’s goal: partitioning the Ottoman Empire to ensure control of the Straits between the Black Sea and the Mediterranean. Nearly a century has passed since the guns fell silent on the western front. But in the lands of the former Ottoman Empire, World War I smolders still. Sunnis and Shiites, Arabs and Jews, and other regional antagonists continue fighting over the last scraps of the Ottoman inheritance. As we seek to make sense of these conflicts, McMeekin’s powerful exposé of Russia’s aims in the First World War will illuminate our understanding of the twentieth century.

The American Civil War (1861-65) was the bloodiest war of the nineteenth century and its impact continues to be felt today. It, and its origins have been studied more intensively than any other period in American history, yet it remains profoundly controversial. Brian Holden Reid's formidable volume is a major contribution to this ongoing historical debate. Based on a wealth of primary research, it examines every aspect of the origins of the conflict and addresses key questions such as was it an avoidable tragedy, or a necessary catharsis for a divided nation? How far was slavery the central issue? Why should the conflict have errupted into violence and why did it not escalate into world war?

Now in a thoroughly revised and updated edition, this classic text presents a comprehensive survey of the many alternative theories that attempt to explain the causes of interstate war. For each theory, Greg Cashman examines the arguments and counterarguments, considers the empirical evidence and counterevidence generated by social-science research, looks at historical applications of the theory, and discusses the theory’s implications for restraining international violence. Among the questions he explores are: Are humans aggressive by nature? Do individual differences among leaders matter? How might poor decision making procedures lead to war? Why do leaders engage in seemingly risky and irrational policies that end in war? Why do states with internal conflicts seem to become entangled in wars with their neighbors? What roles do nationalism and ethnicity play in international conflict? What kinds of countries are most likely to become involved in war? Why have certain pairs of countries been particularly war-prone over the centuries? Can strong states deter war? Can we find any patterns in the way that war breaks out? How do balances of power or changes in balances of power make war more likely? Do social scientists currently have an answer to the question of what causes war? Cashman examines theories of war at the individual, substate, nation-state, dyadic, and international systems level of analysis. Written in a clear and accessible style, this interdisciplinary text will be essential reading for all students of international relations.

From the councils of the Athenian generals to the staff room of the German high command to meetings in the Kennedy White House, Donald Kagan shows the world's great leaders making the critical decisions of peace and war.