What are the conditions for the North American colonies to strive for national independence?

There are four main conditions, the first four are internal factors and the last one is external factors:

First, with the development of colonial capitalist economy in North America, the colonies in North America have formed close economic ties and have the conditions to form an independent country economically.

Second, after 100 years of ethnic integration, the immigrants in the North American colonies have formed independent national characteristics, and a new American nation has been formed with independent cultural and psychological conditions.

Third, due to the development of colonial capitalist economy in North America, the bourgeoisie urgently needs to get rid of the shackles of the sovereign state and is no longer satisfied with being the source of cheap raw materials and the dumping market for consumer goods in Britain.

Fourth, the European enlightenment thoughts spread widely in North America, and North America also produced its own enlightenment thinkers such as Franklin and Jefferson, which had an independent foundation in thought and theory.

Fifth, at that time, Europe, Britain, France, Spain, Portugal and other old and new colonial countries competed for colonial hegemony year after year, which made Britain unable to devote all its energy to suppressing the independence movement in North America. Second, Britain's hostile countries provided a lot of military and political help to North American colonies in the process of independence.