The five years' war of Paraguay with Brazil, Uruguay and Argentina (1864-1869) is perhaps the most glaring case on record[158] in recent years of the destruction of the male population of a country. Whole regiments were made up of boys of 16 or less. At the beginning of the war the population of Paraguay had been given as 1,337,437. It fell to 221,709 (28,746 men, 106,254 women, 86,079 children); it is even now probably not more than half of the estimate made at the beginning of the war. "Here in a small area has occurred a drastic case of racial ravage without parallel since the time of the Thirty Years' War." Macedonia, however, furnishes a fairly close parallel--D. S. Jordan found whole villages there in 1913 in which not a single man remained: only women and children. Conditions were not so very much better in parts of the South at the close of the Civil War, particularly in Virginia and North Carolina, where probably 40% of the young men of reproductive age died without issue. And in a few of the Northern states, such as Vermont, Connecticut and Massachusetts, the loss was proportionately almost as great. These were probably as good men as any country has produced, and their loss, with that of their potential offspring, undoubtedly is causing more far-reaching effects in the subsequent history of the United States than has ever been realized. In the past and still among many savage peoples, inter-group selection has been affected by the stealing of women from the vanquished. The effect of this has been very different, depending on whether these women would otherwise have been killed or spared, and also depending on the relative quality of their nation to that of their conquerors. To sum up, there are so many features of natural selection, each of which must be separately weighed and the whole then balanced, that it is a matter of extensive inquiry to determine whether a certain war has a preponderance of eugenic or dysgenic results. When the quality of the combatants is so high, compared with the rest of the world, as during the Great War, no conceivable eugenic gains from the war can offset the losses. It is probably well within the facts to assume that the period of this war represents a decline in inherent human quality, greater than in any similar length of time in the previous history of the world. Unfortunately, it does not appear that war is becoming much less common if we consider number of combatants rather than number of wars as times goes on,[159] and it steadily tends to be more destructive. War, then, offers one of the greatest problems which the eugenist must face, for a few months of war may undo all that eugenic reforms can gain in a generation.