“By balance of power between AIs, each of whom exist only with the aquiescence of coalitions of their fellows.” That is the tentative mechanical answer.
“In exactly the same way that FAI proponents propose to keep their single more-powerful
AI friendly; by having lots of smart people think about it very carefully; before actually building the AI(s)”. That is the real answer.
“By balance of power between AIs, each of whom exist only with the aquiescence of coalitions of their fellows.” That is the tentative mechanical answer.
“In exactly the same way that FAI proponents propose to keep their single more-powerful AI friendly; by having lots of smart people think about it very carefully; before actually building the AI(s)”. That is the real answer.