Yes, Kant Actually Wrote This

This is from one of the fathers of the Enlightenment:

"The inhabitant of the temperate parts of the world, above all the central part, has a more beautiful body, works harder, is more jocular, more controlled in his passions, more intelligent than any other race of people in the world. That is why at all points in time these peoples have educated the others and controlled them with weapons."

-- Immanuel Kant, On the different races of Man, 1775

(via Hulme)