Why governing principle is most closely related to "one man , one vote?

Equal representation.

Explanation:

The principle of equal dictate that all citizens should have the same power to influence the election regardless of their  race, gender, or social status. This governing principles becomes the backbone of representative democracy all across the world.

This principle is designed to ensure that all people could give their support for the representatives that will fight for their interest within the government. Not only the rich and powerful.

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