It may be said that these two tendencies of the early world--that to persecution and that to imitation--must conflict; that the imitative impulse would lead men to copy what is new, and that persecution by traditional habit would prevent their copying it. But in practice the two tendencies co-operate. There is a strong tendency to copy the most common thing, and that common thing is the old habit. Daily imitation is far oftenest a conservative force, for the most frequent models are ancient. Of course, however, something new is necessary for every man and for every nation. We may wish, if we please, that to-morrow shall be like to-day, but it will not be like it. New forces will impinge upon us; new wind, new rain, and the light of another sun; and we must alter to meet them. But the persecuting habit and the imitative combine to insure that the new thing shall be in the old fashion; it must be an alteration, but it shall contain as little of variety as possible. The imitative impulse tends to this, because men most easily imitate what their minds are best prepared for,--what is like the old, yet with the inevitable minimum of alteration; what throws them least out of the old path, and puzzles least their minds. The doctrine of development means this,--that in unavoidable changes men like the new doctrine which is most of a 'preservative addition' to their old doctrines. The imitative and the persecuting tendencies make all change in early nations a kind of selective conservatism, for the most part keeping what is old, but annexing some new but like practice--an additional turret in the old style. It is this process of adding suitable things and rejecting discordant things which has raised those scenes of strange manners which in every part of the world puzzle the civilised men who come upon them first. Like the old head-dress of mountain villages, they make the traveller think not so much whether they are good or whether they are bad, as wonder how any one could have come to think of them; to regard them as 'monstrosities,' which only some wild abnormal intellect could have hit upon. And wild and abnormal indeed would be that intellect if it were a single one at all. But in fact such manners are the growth of ages, like Roman law or the British constitution. No one man--no one generation--could have thought of them,--only a series of generations trained in the habits of the last and wanting something akin to such habits, could have devised them. Savages PET their favourite habits, so to say, and preserve them as they do their favourite animals; ages are required, but at last a national character is formed by the confluence of congenial attractions and accordant detestations.