What theory of government make the case that no single group of people controls the majority of government decisions?

The answer is "Pluralist theory of government".

The United States enables its natives to take an interest in government from numerous points of view. The United States additionally has various levels and branches of government that any national or gathering may approach. Numerous individuals accept this as proof that U.S. residents, particularly as spoken to by contending gatherings, can impact government activities.

Pluralist theory of government says that political power rests with contending vested parties who share impact in government. Pluralist scholars expect that subjects who need to get engaged with the framework do as such due to the immense number of passages to government.

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