From The Neanderthal Parallax by Robert J. Sawyer: Any serious crime has a single punishment: the castration of the offender and all others who share at least

From The Neanderthal Parallax by Robert J. Sawyer: Any serious crime has a single punishment: the castration of the offender and all others who share at least half his genes (parents, siblings, and children). This eugenic practice serves to keep any undesirable elements out of the gene pool without severely punishing an offender, beyond his loss of genetic heritage. Ponter explains that it also has the desirable secondary effect of eliminating an offender's violent impulses due to their lacking testosterone, and so they don't commit further crimes (how female offenders are punished isn't discussed). https://en.wikipedia.org/wiki/The_Neanderthal_Parallax https://en.wikipedia.org/wiki/The_Neanderthal_Parallax