Woman, on the other hand, although unconsciously inspired by this same fundamental instinct of species-preservation, is not naturally polygamous, or rather polyandrous, because such a state would militate against this end by eventually destroying pure offspring. She only becomes so under certain conditions. Fidelity, then, is, so to speak, a natural state for woman, and she has not to fight against any fundamental instinct of her sex in order to preserve it--she has only to resist perverted desire, which is an exotic growth, the outcome of civilisation. Thus fidelity is much harder for man, who, to succeed in being faithful, is obliged to dominate a natural instinct, which is a far more difficult thing to do than to fight against an exotic desire; because all natural things are governed by inexorable and eternal laws, and are not at the mercy of circumstance. Thus the natural instinct of man is at work all the time in continuous activity--and the exotic desire of woman is intermittent, and the result of circumstance. Of course, all this has been said before by every serious thinker, and I am only reiterating these facts because the general readers may have forgotten them, and I must bring them to their recollection to make the rest of our discussion upon marriage clear. These nature instincts being admitted, we can get on to a survey of legal marriage. At first, it must have been an affair of expediency. The woman was probably expected to be faithful, and brute force took care that she was so, or that she immediately paid the price of possible contamination of offspring by being killed. She was expected to be faithful for a natural reason, not for a spiritual or sentimental one; the reason being, as already inferred, to ensure the purity of the offspring. Man had no need to be faithful to one woman to secure this end, and never, in consequence, dreamed of being so. All through Pagan times infidelity in man was rampant and recognised, and not looked upon as sin. And when woman became civilised enough to have exotic desires, she lost her natural instinct, that of preservation of pure offspring, and became liable to vagrant fancies and often a vicious creature.