There might have been a hundred or a thousand life-bearing planets, had the course of evolution of the universe been a little different, or there might have been none at all. They would probably add, that, as life and man have been produced, that shows that their production was possible; and therefore, if not now then at some other time, if not here then in some other planet of some other sun, we should be sure to have come into existence; or if not precisely the same as we are, then something a little better or a little worse.
Alfred Russel WallaceCivilisation has ever accompanied emigration and conquest - the conflict of opinion, of religion, or of race
Alfred Russel WallaceI hold with Henry George, that at the back of every great social evil will be found a great political wrong
Alfred Russel WallaceIn my solitude I have pondered much on the incomprehensible subjects of space, eternity, life and death.
Alfred Russel Wallace