Yes.
We have been here before. The United States of America were originally 13 separate, sovereign entities, linked only loosely together under the Articles of Confederation.
Yet when Americans saw that these separate states could not adequately respond to existential threats, they left this failing structure behind, sacrificing separate sovereignty in favor of a new, unified, more inclusive government with adequate powers to ensure their survival.
The birth of the current US Constitution was not a gradual progression of incremental measures, tinkering and making do with the old system. Rather, the failing structure was jettisoned, and a whole new one put in place, in a single stroke.