Disintegration, n.
(a) The process by which anything is disintegrated; the condition of anything which is disintegrated. Specifically (b) (Geol.) The wearing away or falling to pieces of rocks or strata, produced by atmospheric action, frost, ice, etc. Society had need of further disintegration before it could begin to reconstruct itself locally. Motley.
Shades of meaning
Fernald has no entry of its own for disintegration; he lists it under revolution.
Where he writes about it:
Anarchy, when more than temporary disorder, is a proposed disintegration of society, in which it is imagined that social order might exist without government. — from revolution