But I have no pretence to speak on such matters; this paper, as I have so often explained, deals with nation-making and not with race-making. I assume a world of marked varieties of man, and only want to show how less marked contrasts would probably and naturally arise in each. Given large homogeneous populations, some Negro, some Mongolian, some Aryan, I have tried to prove how small contrasting groups would certainly spring up within each--some to last and some to perish. These are the eddies in each race-stream which vary its surface, and are sure to last till some new force changes the current. These minor varieties, too, would be infinitely compounded, not only with those of the same race, but with those of others. Since the beginning of man, stream has been a thousand times poured into stream--quick into sluggish, dark into pale--and eddies and waters have taken new shapes and new colours, affected by what went before, but not resembling it. And then on the fresh mass, the old forces of composition and elimination again begin to act, and create over the new surface another world. 'Motley was the wear' of the world when Herodotus first looked on it and described it to us, and thus, as it seems to me, were its varying colours produced.

If it be thought that I have made out that these forces of imitation and elimination be the main ones, or even at all powerful ones, in the formation of national character, it will follow that the effect of ordinary agencies upon that character will be more easy to understand than it often seems and is put down in books. We get a notion that a change of government or a change of climate acts equally on the mass of a nation, and so are we puzzled--at least, I have been puzzled--to conceive how it acts. But such changes do not at first act equally on all people in the nation, On many, for a very long time, they do not act at all. But they bring out new qualities, and advertise the effects of new habits. A change of climate, say from a depressing to an invigorating one, so acts. Everybody feels it a little, but the most active feel it exceedingly. They labour and prosper, and their prosperity invites imitation. Just so with the contrary change, from an animating to a relaxing place,--the naturally lazy look so happy as they do nothing, that the naturally active are corrupted. The effect of any considerable change on a nation is thus an intensifying and accumulating effect. With its maximum power it acts on some prepared and congenial individuals; in them it is seen to produce attractive results, and then the habits creating those results are copied far and wide. And, as I believe, it is in this simple but not quite obvious way, that the process of progress and of degradation may generally be seen to run.

Physics and Politics, or, Thoughts on the application of the principles of