But does Man have any 'right' to spread through the universe? Man is what he is, a wild animal with the will to survive, and (so far) the ability, against all competition. Unless one accepts that, anything one says about morals, war, politics, you name it, is nonsense. Correct morals arise from knowing what man is, not what do-gooders and well-meaning old Aunt Nellies would like him to be. The Universe will let us know - later - whether or not Man has any "right" to expand through it.
Robert A. HeinleinMy folks tried to make a preacher of me and missed by a narrow marginโฆ I would have made a good one if I hadnโt fallen into the fatal folly of reading anything I could lay hands on. With just a touch more self confidence and a liberal helping of ignorance I could have been a famous evangelist.
Robert A. Heinlein