The difference of the degrees in which the individuals of a great community enjoy the good things of life has been a theme of declaration and discontent in all ages; and it is doubtless our paramount duty, in every state of society, to alleviate the pressure of the purely evil part of this distribution, as much as possible, and, by all the means we can devise, secure the lower links in the chain of society from dragging in dishonor and wretchedness.
William Herschel... finding that in [the Moon] there is a provision of light and heat; also in appearance, a soil proper for habitation fully as good as ours, if not perhaps better who can say that it is not extremely probable, nay beyond doubt, that there must be inhabitants on the Moon of some kind or other?
William Herschel