The West is now living in Putin's world. It is there not because Putin is right, or even because he is stronger, but because he is taking the initiative. Putin is "wild" while the West is "wary."
While European and U.S. leaders recognize that the world order is undergoing a dramatic change, they can't quite grasp it. They remain overwhelmed by Putin's transformation from CEO of Russia into an ideology-fueled national leader who will stop at nothing to restore his country's influence.
International politics may be founded on treaties, but it functions on the basis of rational expectations. If those expectations turn out to be wrong, the prevailing international order collapses. That is precisely what has happened in the course of the Ukrainian crisis.