Is This a Hinder of History?

I think I remember thinking one of the chapters is called a hinge of history, but the it's terribly difficult to judge these things. So we never see the moment when we're living in it simply because life is going on around us. For the first time for hundreds of years, a peer competitor for the West, which isn't Western. China is something completely different. And then we have really significant global shared challenges. The most important of which is the global environment. These are challenges humanity has never faced before.