In light of the below post I would now focus more on the role of the middle classes as being the unstable element which brings about fascism due to their un-rootedness in anything, which is unstable, rather than society in general being destabilized from the transition from a conservative, agrarian, society, to a more liberal and industrialized one. But more has to be said about this; unfortunately I don't have the time at the moment to do it.
I think that fascism and totalitarian states have their basis in the instability of the middle classes and their susceptability to reaction and going against the very currents which allowed them to exist in the first place. How this fits into the Soviet experience is very interesting.
Perhaps it the core of it is the domination of the left movement by intellectuals from middle class backgrounds.