WHIch delepment would best serve as a turning point between two historical periods

Civil War

Explanation:

A Civil War best serve as a turning point between two historical periods.

A turning point is the precise, specific or significant moment when something starts to change.

For instance, any Civil War has represented a turning point in the history of a nation. The Civil War in the United States changed the society of America, ending slavery in the country. The Civil War in Mexico, called the Mexican Revolution, transformed the political in the country. The Civil War ended the 33 years of power od Dictator Porfirio Diaz. This represented the entrance of Mexico in a more modern period of social equity.

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the process is called revolution because it was a process of great economic-social transformations that began in england in the xviii century.

the industrial mode of production spread throughout much of the northern hemisphere throughout the xix and early xx centuries.

the effect of this revolution was the distance between the countries, with respect to economic and political power.   after all, not all industrialized at the same time, remaining in the condition of suppliers of raw materials and agricultural products to the industrialized countries.

these differences mark to this day the nations of the world that are divided between developed and developing countries. one way to measure whether a country is advanced is to assess how industrialized it is.