Why did the U. S. enter World War I?

Germany sank many American merchant ships around the British Isles which prompted the American entry into the war.

Explanation:

the social contract theory

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explanation:

max weber's 3 types of authority. the sociologist and philosopher  max weber  distinguishes  three types of authority—charismatic,  traditional  and legal-rational—each of which corresponds to a brand of  leadership that is operative in contemporary society.