262. A SPECIES originates, and a type becomes established and strong in the long struggle with essentially constant UNFAVOURABLE conditions. On the other hand, it is known by the experience of breeders that species which receive super-abundant nourishment, and in general a surplus of protection and care, immediately tend in the most marked way to develop variations, and are fertile in prodigies and monstrosities (also in monstrous vices). Now look at an aristocratic commonwealth, say an ancient Greek polis, or Venice, as a voluntary or involuntary contrivance for the purpose of REARING human beings; there are there men beside one another, thrown upon their own resources, who want to make their species prevail, chiefly because they MUST prevail, or else run the terrible danger of being exterminated. The favour, the super-abundance, the protection are there lacking under which variations are fostered;