What Does Anna Quindlen Mean When She Says America Is An Improbable Idea?

What Does Anna Quindlen Mean When She Says America Is An Improbable Idea? by Anna Quindlen “America is an improbable idea, a mongrel nation built of ever-changing disparate parts, it is held together by a notion, the notion that all men are created equal, though everyone knows that most men consider themselves better than someone.”