The perverted appetites of mankind are mistaken for the natural desires and necessities of our being; and, accordingly, various arguments have been advanced to prove that monogamy is not conducive to social developement. It is curious that no one of these arguments refers to the health and well-being of the _individual_, thus overlooking, perhaps willfully, the great law of social economy. Even a few medical writers sometimes advocate the principles of this so-called liberalism. In a recently published work, there are enumerated only _two_ demerits of polygamy and _six_ of monogamy. These six demerits which the author is pleased to term a "bombshell," he introduces on account of his moral convictions no less than humanitarian considerations. The same author terms monogamy a "worm-eaten and rotten-rooted tree." The worm that is devastating the fairest tree of Eden and draining its richest juices is what our contemporary thinks, may be "_plausibly termed, a necessary evil_." It is claimed that monogamy begets narrow sympathies and leads to selfish idolatry. The fallacy of this argument lies in the misapprehension of the term _selfishness_. Self-preservation is literally selfishness, yet who will deny that it is a paramount duty of man. If perverted, it may be vicious, even criminal; but selfishness, in so far as it is generated by monogamy, is one of the chief elements of social economy; furthermore, it favors the observance of the laws of sexual hygiene. As we have said elsewhere, true love _increases benevolence_, and correspondingly expands and develops the sympathies. Selfish idolatry is preferable to social neglect. This argument will not bear a critical examination; for it is asserted that in a happy union, "love is so exclusive that there is hardly a liking for good neighbors, and scarcely any love at all for God." If the "good neighbors" were equally blessed, they would not suffer from this exclusiveness, and it is practically true that there is no higher incentive to love and obey our Maker than the blessing of a happy marriage. THE PERPETUATION OF THE SPECIES.