By the way, "opinion formation" is a pretty well-established area of research in theoretical computer science that studies stuff like this. You start with a gra

By the way, "opinion formation" is a pretty well-established area of research in theoretical computer science that studies stuff like this. You start with a graph where each node has some opinion that might change based on that of its neighbours. Then you either prove something about the steady state thanks to graph-teoretical stuff, or you run simulations and see what happens. The "committed" individuals (ie. those who never change their opinion) are known as zealots.