Although the conditions of the past have required a vast expenditure of physical energy, the activities of the future will make no such demand. Nature’s forces directed by the human will and intellect are already lessening the necessity for an excessive outlay of bodily strength. It may be truly said that electricity and the innumerable mechanical devices now in use have well nigh supplanted the necessity for great physical exertion. Even war, should it be continued, which is not likely, will be conducted without it. Destructive weapons based upon high-power explosives require little physical effort for their manipulation. The pugilist represents the departing glory of male physical strength. We are informed by Mr. Darwin that by a vast number of measurements taken of various parts of the human body in different races, during his Novara Expedition, it was found that the men in almost every case presented a greater range of variations than women, and, as Mr. Wood has carefully attended to the variations of the muscles of man, Mr. Darwin quotes from him that “the greatest number of abnormalities in each subject is found in males.” He adduces also the testimony of several others who have practically investigated this subject, all of whom agree in their statements that variations in the muscles are more frequent in males than in females. These variations usually consist in a reversion to lower types—a reversion in which muscles proper to lower forms of life make their appearance. In an examination of forty male subjects, there was in nineteen of them a rudimentary muscle found which is designated as the ischio-pubic, and in three others of the forty was observed a ligament which represents this muscle; but, in an examination by the same person of thirty female subjects, in only two of them was this muscle developed on both sides, whilst in three others the rudimentary ligament was present. Thus while we observe that about fifty-five per cent. of the males examined were possessed of muscles proper to lower orders, in only about seventeen per cent. of the females under observation did this reversion appear. In a single male subject, seven muscular variations proper to apes were indicated. Numberless cases might be cited in which reversions and abnormalities have been developed only in the male line. Of the porcupine men of the Lambert family who lived in London last century, Haeckel says: Edward Lambert, born in 1717, was remarkable for a most unusual and monstrous formation of the skin. His whole body was covered with a horny substance, about an inch thick, which rose in the form of numerous thorn-shaped and scale-like processes, more than an inch long. This monstrous formation on the outer skin, or epidermis, was transmitted by Lambert to his sons and grandsons, but not to his granddaughters.[34] [34] _History of Creation_, 1884, vol. i., p. 178.