It is sometimes said that the more developed races have no right to demand an exchange of goods from the Tropics. I do not think that that view can be maintained. The Tropics can yield much to keep the Temperate lands in comfort and to sweeten life for them, and the Temperate lands have a right to ask from the Tropics some of their desirable productions. The world is the inheritance of all men. Tribes and nations have no right to peg off parts of the earth and separate them from the rest as much as though they had been withdrawn to the moon.