If people assumed control, it can't be all people, can it? Can't fit them all in one building, let alone one room.
So 'all people' would have to be pared down to 'some people' with the approval of 'all people'.
But 'some people' would be opposed to those other 'some people', and would want other 'some people'.
'All people' then agree to implement a plan where the majority of 'all people' would designate 'some people' to have control for an agreed upon time, and at the end of that time, 'all people' would convene again to choose 'some people' to have control.
Etc