American history can be divided into three periods: the early period (1492 years ago-1776 years ago); Modern (1776 ——1898); And modern times (1898 to present). The landmark events that distinguish the three periods are 1776 American independence and 1898 Spanish-American War.

1. Early American Development History (A.D. 1492 years ago-A.D. 1776 years ago)

The development of this stage is characterized by the development from primitive clan society to capitalist mode of production, accompanied by the leap of pre-capitalist form. During this period, the development of social forms did not transition in turn, nor did it go through the development stage dominated by slavery and feudal social system. As far as the dominant form of production relations is concerned, it is the period when pre-capitalism and capitalist mode of production began to develop. As far as social and political life is concerned, it was a 13 colonial period in British North America, dominated by indigenous Indians and mainly by English. The fundamental reason lies in the influence of the British who have been in the advanced stage of capitalist development coming to the United States.

2. Modern American History (1776- 1898)

This period is the full development period of American liberal capitalism. The young bourgeoisie has achieved decisive and significant victories in the fields of politics, economy, ideology and culture, and territorial development. The United States firmly established and expanded the bourgeois democratic republic, gradually established the leading position of the industrial bourgeoisie, and the national economy developed rapidly, becoming one of the world's industrial powers in a very short time. At the same time, in the last 30 years of the19th century, it began to transition to the modern capitalist stage, and began to expand overseas after completing the mainland expansion.

3. Modern American History (1898- present)

The modern American history since the Spanish-American War in 1898 has been 100 years. This is the development period of American modern capitalism, that is, monopoly capitalism. This is also the history of the struggle of the American people and progressives against oligarchy and for democracy, progress and social equality. It is also a period of constant reform and adjustment of modern capitalism. During this period, the United States rapidly developed from a world industrial power to the world's number one superpower 1945, and has remained so far. Generally speaking, the development and relatively rapid development of the United States during this period are the main ones.