Surely, modern times present no worse spectacles of carnality than these; and will it be claimed that anything so vile is seen among civilized nations at the present day? But though there may be less grossness in the sensuality of to-day, the moral turpitude of men may be even greater than that of ancient times. Enlightened Christianity has raised the standard of morality. Christ's commentary upon the seventh commandment requires a more rigorous chastity than ancient standards demanded, even among the Jews; for had not David, Solomon, and even the pious Jacob more wives than one? Consequently, a slight breach of chastity now requires as great a fall from virtue as a greater lapse in ages past, and must be attended with as severe a moral penalty. We have seen how universal is the "social evil," that it is a vice almost as old as man himself, which shows how deeply rooted in his perverted nature it has become. The inquiry arises, What are the causes of so monstrous a vice? so gross an outrage upon nature's laws? so withering a blight upon the race? Causes of the "Social Evil."--A vice that has become so great an evil, even in these enlightened times, as to defy the most skillful legislation, which openly displays its gaudy filthiness and mocks at virtue with a lecherous stare, must have its origin in causes too powerful to be ignored. Libidinous Blood.--In no other direction are the effects of heredity to be more distinctly traced than in the transmission of sensual propensities. The children of libertines are almost certain to be rakes and prostitutes. History affords numerous examples in illustration of this fact. The daughter of Augustus was as unchaste as her father, and her daughter was as immoral as herself. The sons of David showed evident traces of their father's failing. Witness the incest of Amnon, and the voluptuousness of Solomon, who had seven hundred wives and three hundred concubines. Solomon's son was, likewise, a noted polygamist, of whom the record says, "He desired many wives." His son's son manifested the same propensity in taking as many wives as the debilitated state of his kingdom enabled him to support. But perhaps we may be allowed to trace the origin of this libidinous propensity still further back. A glance at the genealogy of David will show that he was descended from Judah through Pharez, who was the result of an incestuous union between Judah and his daughter-in-law.