As the status of peoples descends from the enlightened to the savage, the proportion that this class forms of the entire male sex gradually increases. Among enlightened nations, I estimate it at five per cent on the basis of my intimate mingling, in the role of a soubrette, with several thousand young bachelors belonging exclusively to either the tremendously or ultra-virile class, while nearly all my every-day associates have belonged to the mildly virile. On the basis of my reading in anthropology, I estimate the proportion among savages at seventy-five per cent. Among the adult males, I have read that women constitute almost the sole topic of conversation. Fighting and sport fill up the rest of life. When an explorer has visited a savage or barbarous tribe, the outstanding hospitality is the provision of a bed-fellow belonging to the gentle sex. (2) The ULTRA-VIRILE, on either side of the sexually fastest flowing particles just described, take their less rapid course in the stream of masculinity. Sex occupies their thoughts to a much less extent. But, like the tremendously virile, they are naturally [Sidenote: _Natural Polygamy._] polygamous. Only these two classes of males, together with ultra-androgynes and a small proportion of the mildly androgynous, sow wild oats, beginning in their later teens and ending usually in their later twenties. Prior to settling down in marriage, the ultra-virile secretly do not care a fig for the sexual mandates of Christian society. But for the sake of appearances, they hypocritically chime in with the regnant note and openly condemn in the harshest terms the least infraction of the conventions by another than themselves. After marriage, however, their infidelities are few and far between. Perhaps a score in a life-time, as compared with a thousand upward for the tremendously virile. The ultra-virile make excellent husbands and divorce is rare. The wife, however, while herself occupying first place in the husband’s affections, has much cause for jealousy. While the ultra-virile do not regularly choose an occupation free from prosaic toil and ministering to love of sport and adventure, they are usually averse to intellectual pursuits, favoring the manual. If possessing unusual brain power, the ultra-virile man heads some engineering or construction enterprise. The ultra-virile build our railroads, great bridges, leviathans, and sky-scrapers. A handful are distinguished by a knack for political leadership and have contributed the vast majority of such leaders.