American civilization has been shaped by four decisive forces: the frontier, migration, sectionalism, and federalism. The frontier has offered abundance to those who would/could take advantage of its opportunities, stimulated technological innovation, and been the source of continuous change in social structure and economic organization; migration has been responsible for relocating cultures from the Old world to the New; various sections of geographic territories have adjusted to the overall American culture without losing their individual distinctiveness; and federalism has shaped the...