Demographic decline of Indians everywhere. Africans begin to arrive in North America. Indian decline continues. Prototypical U.S. cultures established in New England, New York, Delaware, New Jersey, Pennsylvania, Virginia, the Frontier, and Far Southwest. Stabilization and expansion of colonial cultures.
Heavy immigration begins.
Stresses between colonies and imperial government end in independence and constitutional synthesis. Intense internal states development. Full continental expansion. Industrialization begins and flourishes. War to confirm national rule and end slavery.