Dissolution is the noun form of dissolve, but it's a much less common word. Still, we refer to the fact that the dissolution of American marriages became far more common in the later 20th century. Or that when India won its independence in 1947, the dissolution of the once-global British empire was all but complete. Or that factors such as crime and drugs might be contributing to the dissolution of contemporary society's moral fabric. A dissolute person is someone in whom all restraint has dissolved, and who now indulges in behavior that shocks decent people.