Neil Howe's book The Fourth Turning is Here is proving to be a thought provoking read. Here are exerpts from the Preface and Chapter 1 with my thoughts in Blockquote:

Preface

This book proposes that America is midway through an era of historical crisis, which- almost by definition-will lead to outcomes that are largely though not entirely beyond our control. The prospect of such radical uncertainty may fill us with dread.
All too often in the modern West we fear that any outcome not subject to our complete control must mean we are heading toward catastrophe.
Over the course of this book, I hope to persuade you of a more ancient yet also more optimistic doctrine: that our collective social life, as with so many rhythmic systems in nature, requires seasons of sudden change and radical uncertainty in order for us to thrive over time. Or, to paraphrase Blaise Pascal: History has reasons that reason knows nothing of.