My honest expectations are that if liberalism goes south, it will be because of the aggressive insistence of liberals on self-sabotage and idiocy, if anything. This does complicate things for people who want to do something constructive, though. I can't think of anything doable other than building human capital, networking and promoting a new counter-culture and self-improvement, then just waiting for a political solution to develop on its own. It seems like an atrocious plan but I can't think of anything better. Even then, that also has its risks.