I'm not sure I can answer that question easily, except to make a general point, and that is, I think it's true that many countries did not take the threat of a Russian invasion as seriously as we all should have. I'm not being critical of any one country or another, but I think there will be lots of historians who want the answer. However, right now we're in the middle of a battle, and it's a battle for the lives of the Ukrainian people. The moments for analysis or reanalysis or reconsideration will come later. Right now we're at the coal face, and it's a very tough place to be.
On February 28th, 2022. See this statement in context.