It’s difficult to answer, but I guess there have been cases of high uncertainty also in the past. And people coped and ultimately the economy recovered. Of course, the world is more complex today than it was forty or sixty years ago. Our societies are older, wealthier. As a result, the reaction might be slower.
I think that what is most important is not to fool ourselves into thinking that problems can be overcome by repeatedly postponing them, by borrowing indefinitely from future generations. Our economies will face serious challenges in the coming years, not least because, as I mentioned, the post-crisis world will be different from the pre-crisis one.