Bruno was no imperialist. Nature seemed to him to have fixed definite boundaries to the extension of the different races, by which the special genius of each was kept pure. In the _Cena_ (126. 9) Tiphys and his successors (Columbus, Vespucci, and others are meant, although not named) are said to have "discovered means of disturbing the peace of peoples, violating the natural trend of the genius of countries, confounding what foreseeing nature had distinguished, doubling, through commerce, evil feelings, adding the vices of one race to those of another, propagating new incitements, instruments, methods of tyranny and assassination, which in time, by the natural vicissitude of things, would recoil upon our own heads."[471] It was really, he thought, for the advantage of men themselves that the world-regions should be kept as distinct in their usages and customs as they are physically distinct by the natural divisions of mountains and tracts of sea. From region to region, vice and the poison of perverse laws and religions, the materials of discord and extermination, were propagated and disseminated to the suffocation of every good fruit; there were no advantages which could compare with these evils.[472] It should be remembered that the colonists of the day were the Spaniards, with the corruption and cruelty of whose rule Italians were only too familiar; and their misdeeds were far greater in the new world. [Sidenote: Progress.] [Sidenote: Evolution.] [Sidenote: Man and the animals.]