Atlantic history is a specialty field in history that studies the Atlantic World in the early modern period. The Atlantic World was created by the discovery of a new land by Europeans, and Atlantic History is the study of that world. It is premised on the idea that, following the rise of sustained European contact with the New World in the 16th century, the continents that bordered the Atlantic Ocean—the Americas, Europe, and Africa—constituted a regional system or common sphere of economic and cultural exchange that can be studied as a totality. Its theme is the complex interaction between Europe (especially Britain, France, Spain, and Portugal) and the New World colonies. It encompasses a wide range of demographic, social, economic, political, legal, military, intellectual and religious topics treated in comparative fashion by looking at both sides of the Atlantic. Religious revivals characterized Britain and Germany, as well as the First Great Awakening in the American colonies. Migration and race/slavery have been important topics. Researchers of Atlantic history typically focus on the interconnections and exchanges between these regions and the civilizations they harbored. In particular, they argue that the boundaries between nation states which traditionally determined the limits of older historiography should not be applied to such transnational phenomena as slavery, colonialism, missionary activity and economic expansion. Environmental history and the study of historical demography also play an important role, as many key questions in the field revolve around the ecological and epidemiological impact of the Columbian Exchange. Robert R. Palmer, an American historian of the French Revolution, pioneered the concept in the 1950s with a wide-ranging comparative history of how numerous nations experienced what he called The Age of the Democratic Revolution: A Political History of Europe and America, 1760–1800 (1959 and 1964). Since the 1980s Atlantic history has emerged as an increasingly popular alternative to the older discipline of imperial history, although it could be argued that the field is simply a refinement and reorientation of traditional historiography dealing with the interaction between early modern Europeans and native peoples in the Atlantic sphere. The organization of Atlantic History as a recognized area of historiography began in the 1980s under the impetus of American historians Bernard Bailyn of Harvard University and Jack P. Greene of Johns Hopkins University, among others. The post-World War II integration of the European Union and the continuing importance of NATO played an indirect role in stimulating interest throughout the 1990s. Bernard Bailyn's Seminar on the History of the Atlantic World promoted social and demographic studies, and especially regarding demographic flows of population into colonial America. As a leading advocate of the history of the Atlantic world, Bailyn has organized an annual international seminar at Harvard designed to promote scholarship in this field. Bailyn's Atlantic History: Concepts and Contours (2005) explores the borders and contents of the emerging field, which emphasizes cosmopolitan and multicultural elements that have tended to be neglected or considered in isolation by traditional historiography dealing with the Americas. Bailyn's reflections stem in part from his seminar at Harvard since the mid-1980s. Other important scholars are Jack Greene directed a program at Johns Hopkins in Atlantic History from 1972 to 1992 that has now expanded to global concerns. Karen Ordahl Kupperman established the Atlantic Workshop at New York University in 1997. Other scholars in the field include Ida Altman, Kenneth J. Andrien, David Armitage, Trevor Burnard, Jorge Canizares-Esguerra, Nicholas Canny, Philip D. Curtin, Laurent Dubois, J.H. Elliott, David Eltis, Alison Games, Eliga H. Gould, Anthony Grafton, Joseph C. Miller, Philip D. Morgan, Anthony Pagden, Jennifer L. Anderson, John Thornton, James D. Tracy, Carla G. Pestana, Isaac Land, Richard S. Dunn, and Ned C. Landsman. Alison Games (2006) explores the convergence of the multiple strands of scholarly interest that have generated the new field of Atlantic history, which takes as its geographic unit of analysis the Atlantic Ocean and the four continents that surround it. She argues Atlantic history is best approached as a slice of world history. The Atlantic, moreover, is a region that has logic as a unit of historical analysis only within a limited chronology. An Atlantic perspective can help historians understand changes within the region that a more limited geographic framework might obscure. Attempts to write a Braudelian Atlantic history, one that includes and connects the entire region, remain elusive, driven in part by methodological impediments, by the real disjunction that characterized the Atlantic's historical and geographic components, by the disciplinary divisions that discourage historians from speaking to and writing for each other, and by the challenge of finding a vantage point that is not rooted in any single place.