And that John F. Kennedy uttered the first variation of "ask not what your country can do for you" in Detroit on Labor Day in 1960. So Detroit was really central to Democratic politics United States. Every Democratic candidate would start their fall campaigns in Cadillac Square.

Originally, John Kennedy was going to come speak, and then Lyndon Johnson. Because it was October of '62, neither made it because of the Cuban missile crisis.

I want to write for history, not for the moment.

You also had in Detroit that summer, an early variation of Ferguson. A black prostitute was shot in the back by police. And all of the efforts that a very progressive police chief and mayor of that period had put into trying to restore race relations started to fall apart again, and you could see that unraveling for several years until the riots or rebellion of 1967.

It seemed that I could tell the whole story pretty powerfully in those 18 months between October of '62 and the spring of '64 when they were all at their peak. And yet you could see some of the shadows of Detroit's demise coming.

Well, there is something beautiful about ruins. I mean, in one sense it's not that different from going to Rome and looking at the Forum. But it's changing. It truly is. I'm optimistic but skeptical.

And then the industry itself was so cocky about what they were doing that they weren't seeing what was coming on the horizon with Japan and Germany and other places that were building smaller cars.