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 suppose that it is necessarily to their interest to make divorce very difficult. Habitual drunkenness, cruelty, insanity are grounds upon which divorce is necessary for the children's sake quite as much as for the sake of the wife or husband. The peculiar importance attached, at present, to adultery is quite irrational. It is obvious that many forms of misconduct are more fatal to married happiness than an occasional infidelity. Masculine insistence on a child a year, which is not conventionally misconduct or cruelty, is the most fatal of all.

Moral rules ought not to be such as to make instinctive happiness impossible. Yet that is an effect of strict monogamy, in a community where the numbers of the two sexes are very unequal. Of course, under such circumstances, the moral rules are infringed. But when the rules are