The Kulaks were wealthy farmers in the Soviet Union. Colllectivization meant the collection of private goods, especially land, and handing them over to the state so that they are governed by the whole society.
Collectivisation would mean that the Kulaks would be deprived of their goods, so they naturally opposed it.
Answer:
He belief that political authority should rest with the people themselves is called: popular sovereignty
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Explanation:
Popular sovereignty, also termed settler sovereignty, in U.S. archives, a provocative political theory according to which the personalities of federal provinces should choose for themselves whether their provinces would enroll the Union as vacant or slave states.
Popular sovereignty is the system that the government of a state and its administration are formed and maintained by the permission of its people, through their elected representatives.