In human history these same tendencies have continually been illustrated. The Greeks, our pioneers in all insight and knowledge, grappled (as Professor Myres has lately set forth[3]), and realised that they were grappling, with this same problem. Even in the Minoan Age their population would appear to have been full to overflowing; "there were too many people in the world," and to the old Greeks the Trojan War was the earliest divinely-appointed remedy. Wars, famines, pestilences, colonisation, wide-spread infanticide were the methods, voluntary and involuntary, by which this excessive birth-rate was combated, while the greatest of Greek philosophers, a Plato or an Aristotle, clearly saw that a regulated and limited birth-rate, a eugenically improved race, is the road to higher civilisation. We may even see in Greek antiquity how a sudden rise in industrialism leads to a crowded and fertile urban population, the extension of slavery, and all the resultant evils. It was a foretaste of what was seen during the eighteenth and nineteenth centuries, when a sudden industrial expansion led to an enormously high birth-rate, a servile urban proletariat (that very word indicates, as Roscher has pointed out, that a large family means inferiority), and a consequent outburst of misery and degradation from which we are only now emerging. As we are now able to realise, the sudden expansion of the population accompanying the industrial revolution was an abnormal and, from the point of view of society, a morbid phenomenon. All the evidence goes to show that previously the population tended to increase very slowly, and social evolution was thus able to take place equably and harmoniously. It is only gradually that the birth-rate has begun to right itself again. The movement, as is well known, began in France, always the most advanced outpost of European civilisation. It has now spread to England, to Germany, to all Europe, to the whole world indeed, in so far as the world is in touch with European civilisation, and has long been well marked in the United States.