Answer:
pluralist theory
Step-by-step explanation:
The theory that explains/argues this position is known as pluralist theory. Like mentioned this theory describes a political system where there is more than one center of power, usually referring to democracy even though this is not always the case. This can also be applied to a society where various individuals, groups, or entities share political power, an example of which being various groups with different cultural backgrounds keeping their own traditions. Thus retaining cultural power.