In the second place, apart from a priori reasoning, this conclusion should be forced on the legislator by comparisons of societies. It ought to be sufficiently manifest that before meddling with the details of social organization, inquiry should be made whether social organization has a natural history; and that to answer this inquiry, it would be well, setting out with the simplest societies, to see in what respects social structures agree. Such comparative sociology, pursued to a very small extent, shows a substantial uniformity of genesis. The habitual existence of chieftainship, and the establishment of chiefly authority by war; the rise everywhere of the medicine man and priest; the presence of a cult having in all places the same fundamental traits; the traces of division of labour, early displayed, which gradually become more marked; and the various complications, political, ecclesiastical, industrial, which arise as groups are compounded and recompounded by war; quickly prove to any who compares them that, apart from all their special differences, societies have general resemblances in their modes of origin and development. They present traits of structure showing that social organization has laws which over-ride individual wills; and laws the disregard of which must be fraught with disaster.
And then, in the third place, there is that mass of guiding information yielded by the records of legislation in our own country and in other countries, which still more obviously demands attention. Here and elsewhere, attempts of multitudinous kinds, made by kings and statesmen, have failed to do the good intended and have worked unexpected evils. Century after century new measures like the old ones, and other measures akin in principle, have again disappointed hopes and again brought disaster. And yet it is thought neither by electors nor by those they elect, that there is any need for systematic study of that law-making which in bygone ages went on working the ill-being of the people when it tried to achieve their well-being. Surely there can be no fitness for legislative functions without the wide knowledge of those legislative experiences which the past has bequeathed.