This may not belong here, but I don't want to make a new thread for it.
If the communist state is reached, how can it be ensured that no one takes power? That no one comes up with a new idea and creates a business?
Would there be something which we may call a weakened state?
You can come up with all the new ideas you want (in fact you'd be encourage to do so), but starting a business requires private property over the means of production, which is something that will not exist under communism.
There is no need to have a state-like entity actively preventing people from starting a business. On the contrary, it's only due to the capitalist state that you can have private property and start a business in the first place. Think about it: What does it mean to say "this thing is my property"? It means "the state will send policemen to arrest you if you try to use this thing without my approval." Your property is yours only because the state says so.
"When I give food to the poor, they call me a saint. When I ask why the poor have no food, they call me a communist."
- Dom Helder Camara, Brazilian archbishop
"Definition of a conservative: a person who believes that nothing should be done for the first time." - mikelepore