Observations Concerning the Increase of Mankind

Franklin examines why the population of Britain's American colonies could grow rapidly through immigration, agriculture, available land, and economic opportunity. He treats population as a question connected to labor, settlement, trade, and imperial power.

The essay was published in 1751. Franklin wrote it in the context of debates over colonial growth and British economic restrictions, including the Iron Act of 1750.

He emphasized fertile land, food production, employment, marriage, and opportunities for new trades and manufactures. He also argued that colonial growth could strengthen Britain, although the essay contains assumptions about Indigenous land and colonial expansion that modern readers must examine critically.

Yes, he projected that the population of the Thirteen Colonies could double roughly every 25 years under favorable conditions. His calculation made colonial population growth part of a broader argument about the future power of British America.