You know, I never thought about that inherent self-contradiction in liberalism before. They want to totally destroy all our millenia-old ciivic institutions overnight and instantly embrace radical change (homo "marriage," abortion on demand, free narcotics), yet they are totally committed to lethargic, ossified, nonchanging central control of all economic aspects of our lives (state ownership of enterprise, state control of health care).
You point out a very important aspect of the liberal ("Progressive") view of governance. It regards the accumulated wisdom of millenia of human societies as useless or worthless. This ignores the fact that everything they know and everything they are is a result of that accumulated wisdom.
Ossified is a great word for that view. They want to fabricate a view of how things could be, not how they are or ever were, and impose that view of how things should be, through law and regulation, on how things are. That arbitrarily imposed model is then applied to what 'is' in an attempt to freeze everything in that made up image of order. Individuals and societies are expected to mirror that artificial construct and ossify themselves into an unchanging image of perfection devoid of historical context. The unexpected is expected to never arise.