Has there been any real significant historical or philosophical turning or inflection points in the notion of statesmanship that you would want to point us to?

Sure.

The book, I'm a scholar of politics.

Like many people, I like typologies.

I like creating categories and thinking of different kinds.

And one of the arguments I make in the book is statesmen are not all of a piece.

There are different types who respond in many ways to different kinds of historical situations.

Any other presidents that might make that list for you?