Also, the Earth-based colonization is not a great example since, even with the given of the US (which is a special case I think many would agree) the entire population of white Europeans living outside of Europe is still much smaller than Europe's as a whole (this is relative to Earth's population). This after they began colonizing outside of Europe almost 700 years ago, on one planet no less.
Setting aside the charming sub-category of "white
Europeans," the combined population of the Americas and Australia exceeds Europe's by some 200 million people, to be sure there are original peoples there as well as immigrates from other areas of the world. Still there are more people of European descent living outside of Europe that inside.
... even with the given of the US (which is a special case I think many would agree)
Not sure that I grasp what you mean here, special case how?
Kirk: "We're on a thousand planets and spreading out."
From Kirk's conversation with Zefram Cochrane, the argument could be made that Kirk's use of "we're" in this case refers only to Humans.