Tolkien's talk of "greater" and "lesser" men (and the same with different types of elves) is a bit smelly by modern standards, but one of the points of his works is that while the Men of Numenor are stronger, larger, more clever, etc. than "lesser" men, that doesn't make them morally superior in any way, shape or form.Well, I am sure he had plenty of Victorian implicit biases (how could he not?), but as far as colonialism goes, he was rather aggressively critical of it. Numenor is a not-at-all-subtle critique of the then-contemporary UK, and among the many sins of Numenor was using their navy to exploit and dominate people throughout the world.