In the decades after the United States formally declared its independence in 1776, Americans struggled to gain recognition of their new republic and their rights as citizens. None had to fight harder than the nation's seamen, whose labor took them far from home and deep into the Atlantic world. Citizen Sailors tells the story of how their efforts to become American at sea in the midst of war and revolution created the first national, racially inclusive model of United States citizenship. Nathan Perl-Rosenthal immerses us in sailors' pursuit of safe passage through the ocean world during the turbulent age of revolution. Challenged by British press-gangs and French privateersmen, who considered them Britons and rejected their citizenship claims, American seamen demanded that the U.S. government take action to protect them. In response, federal leaders created a system of national identification documents for sailors and issued them to tens of thousands of mariners of all races-nearly a century before such credentials came into wider use. Citizenship for American sailors was strikingly ahead of its time: it marked the federal government's most extensive foray into defining the boundaries of national belonging until the Civil War era, and the government's most explicit recognition of black Americans' equal membership as well. This remarkable system succeeded in safeguarding seafarers, but it fell victim to rising racism and nativism after 1815. Not until the twentieth century would the United States again embrace such an inclusive vision of American nationhood.

The past twenty-five years have brought a dramatic expansion of scholarship in maritime history, including new research on piracy, long-distance trade, and seafaring cultures. Yet maritime history still inhabits an isolated corner of world history, according to editors Lauren Benton and Nathan Perl-Rosenthal. Benton and Perl-Rosenthal urge historians to place the relationship between maritime and terrestrial processes at the center of the field and to analyze the links between global maritime practices and major transformations in world history. A World at Sea consists of nine original essays that sharpen and expand our understanding of practices and processes across the land-sea divide and the way they influenced global change. The first section highlights the regulatory order of the seas as shaped by strategies of land-based polities and their agents and by conflicts at sea. The second section studies documentary practices that aggregated and conveyed information about sea voyages and encounters, and it traces the wide-ranging impact of the explosion of new information about the maritime world. Probing the political symbolism of the land-sea divide as a threshold of power, the last section features essays that examine the relationship between littoral geographies and sociolegal practices spanning land and sea. Maritime history, the contributors show, matters because the oceans were key sites of experimentation, innovation, and disruption that reflected and sparked wide-ranging global change. Contributors: Lauren Benton, Adam Clulow, Xing Hang, David Igler, Jeppe Mulich, Lisa Norling, Nathan Perl-Rosenthal, Carla Rahn Phillips, Catherine Phipps, Matthew Raffety, Margaret Schotte.