The first page of the Treaty of Paris, signed 10 February 1763, which ended the Seven Years' War and handed Britain control of eastern North America.

Put a map of North America from 1754 next to one from 1763 and France has all but vanished from the continent. In the first map, French territory runs in a wide arc from the mouth of the St. Lawrence through the Great Lakes down the Mississippi to New Orleans, hemming in thirteen British colonies clinging to the Atlantic coast. In the second, that arc is gone. Britain holds everything east of the Mississippi. Spain holds everything west of it, plus New Orleans. France holds a scatter of Caribbean sugar islands and a fishing station off Newfoundland. The change took nine years of a war fought on five continents and ended with a single signature, on 10 February 1763, at the Treaty of Paris. What makes the map interesting is not that France lost. It is that France's own negotiators, given the choice, decided a scatter of sugar islands mattered more than losing Canada.

The war itself — called the Seven Years' War in Europe and the French and Indian War in America — began over exactly the ambiguity the map shows: overlapping claims to the Ohio Valley, where French and British colonists and their Native American allies were already skirmishing years before the great powers formally declared war in 1756. It escalated into arguably the first true world war, fought in Germany, India, West Africa and the Philippines as well as North America, because Britain and France's colonial rivalries never stayed regional for long. Britain, financing a war chest that dwarfed France's and backed by a navy that could isolate French colonies from resupply, spent the war methodically taking French possessions it did not necessarily intend to keep: Quebec fell in 1759, Montreal in 1760, and by 1762 British forces had also seized the French Caribbean islands of Martinique and Guadeloupe and, allied with Spain's entry into the war, the Spanish ports of Havana and Manila.

It was that pile of captured territory, at the negotiating table, that produced the treaty's strangest decision. France's foreign minister, the Duc de Choiseul, had Canada, Guadeloupe and Martinique all sitting on the table as things Britain might hand back. He chose to fight hardest for the sugar islands. The reasoning was coldly commercial: Guadeloupe and Martinique's plantations, worked by enslaved labor, were shipping sugar back to France in quantities worth more, by contemporary estimates, than everything Canada's fur trade brought in. Voltaire had mocked the whole war two years earlier in Candide, having a character scoff that France and Britain were spending vastly more fighting over Canada — "a few acres of snow" — than the territory itself was worth. It was a punchline because enough of literate French society already believed it. Choiseul negotiated accordingly: he let Canada go and secured the return of Guadeloupe and Martinique. Britain, for its part, had its own internal debate — some voices, including the wartime leader William Pitt, had argued for keeping the more profitable Caribbean islands instead of Canada — but ultimately kept Canada for strategic reasons: eliminating French power on the frontier of Britain's thirteen colonies outweighed the sugar math.

Spain came out of the war reshuffling its own map. Madrid had to hand Havana and Manila back but ceded Florida to Britain as the price of getting them back — and was quietly compensated the year before, in the secret 1762 Treaty of Fontainebleau, with French Louisiana west of the Mississippi, a transfer the public treaty of 1763 simply confirmed. In India, the treaty required France to demolish its fortifications and abandon ambitions of a rival empire, cementing the dominance the British East India Company had already seized on the battlefield at Plassey in 1757. One peace conference redrew coastlines on three continents at once.

The consequences outlasted the ink. With France gone from the eastern half of North America, Britain no longer needed thirteen colonies willing to fund their own defense against a rival empire — and colonial resentment of the taxes London still tried to impose anyway fed directly into the unrest that became, within thirteen years, the American Revolution. The frontier line Britain drew in 1763 to calm Native nations already at war over the new arrangement, in what became Pontiac's War, would be defied by colonists for a decade before it, too, became a grievance. The map of 1763 was drawn by men balancing furs against sugar and fortresses against fisheries — an accountant's peace, not a geographer's — and it rearranged a continent's future almost as an afterthought.

Sources: Encyclopaedia Britannica, "Treaty of Paris (1763)" and "Seven Years' War"; Fred Anderson, Crucible of War: The Seven Years' War and the Fate of Empire in British North America, 1754–1766; Voltaire, Candide (1759); Jonathan R. Dull, The French Navy and the Seven Years' War.

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