The comparative prevalence of criminality has long been the test most complacently adopted by those who seek to measure civilisation on its moral and most fundamental aspect. Crime is merely a name for the most obvious, extreme, and directly dangerous forms of what we call immorality—that is to say, departure from the norm in manners and customs. Therefore the highest civilisation is that with the least crime. But is it so? The more carefully we look into the matter, the more difficult it becomes to apply this test. We find that even at the outset. Every civilised community has its own way of dealing with criminal statistics and the discrepancies thus introduced are so great that this fact alone makes comparisons almost impossible. It is scarcely necessary to point out that varying skill and thoroughness in the detection of crime, and varying severity in the attitude towards it, necessarily count for much. Of not less significance is the legislative activity of the community; the greater the number of laws, the greater the number of offences against them. If, for instance, Prohibition is introduced into a country, the amount of delinquency in that country is enormously increased, but it would be rash to assert that the country has thereby been sensibly lowered in the scale of civilisation. To avoid this difficulty, it has been proposed to take into consideration only what are called “natural crimes”; that is, those everywhere regarded as punishable. But, even then, there is a still more disconcerting consideration. For, after all, the criminality of a country is a by-product of its energy in business and in the whole conduct of affairs. It is a poisonous excretion, but excretion is the measure of vital metabolism. There are, moreover, the so-called evolutive social crimes, which spring from motives not lower but higher than those ruling the society in which they arise.[116] Therefore, we cannot be sure that we ought not to regard the most criminal country as that which in some aspects possesses the highest civilisation.