Throughout history, human societies have been organized preeminently as territories—politically bounded regions whose borders define the jurisdiction of laws and the movement of peoples. At a time when the technologies of globalization are eroding barriers to communication, transportation, and trade, Once Within Borders explores the fitful evolution of territorial organization as a worldwide practice of human societies. Master historian Charles S. Maier tracks the epochal changes that have defined territories over five centuries and draws attention to ideas and technologies that contribute to territoriality’s remarkable resilience.

Territorial boundaries transform geography into history by providing a framework for organizing political and economic life. But properties of territory—their meanings and applications—have changed considerably across space and time. In the West, modern territoriality developed in tandem with ideas of sovereignty in the seventeenth century. Sovereign rulers took steps to fortify their borders, map and privatize the land, and centralize their sway over the populations and resources within their domain. The arrival of railroads and the telegraph enabled territorial expansion at home and abroad as well as the extension of control over large spaces. By the late nineteenth century, the extent of a nation’s territory had become an index of its power, with overseas colonial possessions augmenting prestige and wealth and redefining territoriality.

Turning to the geopolitical crises of the twentieth century, Maier pays close attention to our present moment, asking in what ways modern nations and economies still live within borders and to what degree our societies have moved toward a post-territiorial world.

In January 1995, fighting broke out between Ecuadorian and Peruvian military forces in a remote section of the Amazon. It took more than three years and the interplay of multiple actors and factors to achieve a definitive peace agreement, thus ending what had been the region's oldest unresolved border dispute. This conflict and its resolution provide insights about other unresolved and/or disputed land and sea boundaries which involve almost every country in the Western Hemisphere.

Drawing on extensive field research at the time of the dispute and during its aftermath, including interviews with high-ranking diplomats and military officials, Power, Institutions, and Leadership in War and Peace is the first book-length study to relate this complex border dispute and its resolution to broader theories of conflict. The findings emphasize an emerging leadership approach in which individuals are not mere captives of power and institutions. In addition, the authors illuminate an overlap in national and international arenas in shaping effective articulation, perception, and selection of policy.

In the “new” democratic Latin America that emerged in the late 1970s through the early 1990s, historical memory remains influential in shaping the context of disputes, in spite of presumed U.S. post–Cold War influence. This study offers important, broader perspectives on a hemisphere still rife with boundary disputes as a rising number of people and products (including arms) pass through these borderlands.