Before 1650, only a few hundred Scots had trickled into the American colonies, but by the early 1770s the number had risen to 10,000 per year. A conservative estimate of the total number of Scots who settled in North America prior to 1785 is around 150,000.

Who were these Scots? What did they do? Where did they settle? What factors motivated their emigration? Dobson's work, based on original research on both sides of the Atlantic, comprehensively identifies the Scottish contribution to the settlement of North America prior to 1785, with particular emphasis on the seventeenth century.