The eighteenth century witnessed the birth of Great Britain (after the union of England and Scotland in 1707) and the expansion of the British Empire. By the mid-1700s, Great Britain had developed into a commercial and military powerhouse; its economic sway ranged from India, where the British East India Company had gained control over both trade and territory, to the West African coast, where British slave traders predominated, and to the British West Indies, whose lucrative sugar plantations, especially in Barbados and Jamaica, provided windfall profits for British planters. Meanwhile, the population rose dramatically in Britain’s North American colonies. In the early 1700s the population in the colonies had reached 250,000. By 1750, however, over a million British migrants and African slaves had established a near-continuous zone of settlement on the Atlantic coast from Maine to Georgia. During this period, the ties between Great Britain and the American colonies only grew stronger. Anglo-American colonists considered themselves part of the British Empire in all ways: politically, militarily, religiously (as Protestants), intellectually, and racially.