Power is the ability to make people do what you want.
Where does power come from?
As far as I can tell, the formalists believe that power comes from military force, and is often unitary.
I believe that power now comes primarily from economics, significantly from persuasion/moral issues, and the idea of unitary power doesn't pass the laugh test, nor has it ever, in any society, for all of recorded history.
In slave times (Athens, Rome, or US 1850), some slaves were given more power/authority by their masters than most free men. Why? Because the slaves had a scarce skill that the master needed more than the slave needed anything the master could give/withhold.
If you have a notion that enough military force can get you what you want...you're talking about a South American dictator, or Stalin....both of whom were simply balancing the other dozen power interests against one another more effectively than anyone else was. Power is an economic balance...or more accurately a MORAL balance.
Tiananmen Square happened only after the Chinese Central authorities replaced the troops with folks from the provinces who were thoroughly indoctrinated with a central-command approved vision of reality. They knew that they couldn't rely (Chinese government is strong?) on the local troops to fire on their compatriots.
The colonial times succeeded in their order-keeping brutalities because they were able to assign sub- to semi- human status to their subjects. Until you succeed in assigning sub-human status to the objector, the central authority loses morally.
Heck, $10 (I'm poor) says that in 15 years (I like the year 2025), the ability of the Chinese government to force their wishes will have fallen substantially. The protesters would win Tiananmen Square, or its 2025 equivalent. And it will have fallen because as the people have become richer, the power of the central government (comparatively) has waned...and the balance of power, entirely economic, and entirely outside the control of the planners, has shifted.