82:4.4

Modern sex jealousy is not innate; it is a product of the evolving mores. Primitive man was not jealous of his wife; he was just guarding his property. The reason for holding the wife to stricter sex account than the husband was because her marital infidelity involved descent and inheritance. Very early in the march of civilization the illegitimate child fell into disrepute. At first only the woman was punished for adultery; later on, the mores also decreed the chastisement of her partner, and for long ages the offended husband or the protector father had the full right to kill the male trespasser. Modern peoples retain these mores, which allow so-called crimes of honor under the unwritten law.