The conquest of the earth, which mostly means the taking it away from those who have a different complexion or slightly flatter noses than ourselves, is not a pretty thing when you look into it too much. What redeems it is the idea only. An idea at the back of it, not a sentimental pretence but an idea: and an unselfish belief in the idea--something you can set up, and bow down before, and offer a sacrifice to...