Not long ago—in the mid-twentieth century, for example—virtually all college-level history courses were organized in terms of particular civilizations or nations. In the United States, courses such as Western Civilization or some version of American History served to introduce students to the study of the past. Since then, however, a set of profound changes has pushed much of the historical profession in a different direction.

The world wars of the twentieth century, revealing as they did the horrendous consequences of unchecked nationalism, persuaded some historians that a broader view of the past might contribute to a sense of global citizenship. Economic and cultural globalization has highlighted both the interdependence of the world’s Peoples and their very unequal positions within that world. Moreover, we are aware as never before that our problems—whether they involve economic well-being, global warming, disease, or terrorism—respect no national boundaries. To many thoughtful people, a global present seemed to call for a global past. Furthermore, as colonial empires shrank and new nations asserted themselves on the world stage, these Peoples also insisted that their histories be accorded equivalent treatment with those of Europe and North America. An explosion of new knowledge about the histories of Asia, Africa, and pre-Columbian America erupted from the research of scholars around the world. All of this has generated a “world history movement,” reflected in college and high school curricula, in numerous conferences and specialized studies, and in a proliferation of textbooks, of which this is one.

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This world history movement has attempted to create a global understanding of the human past that highlights broad patterns cutting across particular civilizations and countries, while acknowledging in an inclusive fashion the distinctive histories of its many peoples. This is, to put it mildly, a tall order. How is it possible to encompass within a single book or course the separate stories of the world’s various peoples? Surely it must be something more than just recounting the history of one civilization or culture after another. How can we distill a common history of humankind as a whole from the distinct trajectories of particular peoples? Because no world history book or course can cover everything, what criteria should we use for deciding what to include and what to leave out? Such questions have ensured no end of controversy among students, teachers, and scholars of world history, making it one of the most exciting fields of historical inquiry.