So, how would you define “taking humanity to Mars”? Surely you don’t have to take all the humans to Mars.

We’d all agree that Europeans (non-exclusively) colonized the Americas, but not all Europeans went and not all had the opportunity.

You compared a tangible item being divided amoung people to an achievement for humanity as a species. They are two different things.

That's my issue

The Americas were divided among people (original inhabitants, and later colonies), and many countries & people weren’t recipients. But I’d still say that humanity has reached America.