Polygamy

>Having more than one woman is the same as rape and theft
>Ignoring that you aren't hurting anyone with dating several woman (except beta soygoy's)

One reason.

Because if old rich men have all the young right pussy then the young military aged men, the start cutting throats.

Polygamy is truly evolutionary based where the most powerful men get to have dozens and dozens of children and multiple wives
Throughout human history the strongest men had 50-60x the genetic lineage passed down to the lowest and weakest men
If polygamy was allowed and people became free from law there would be a revolt since 95% of the women would be banging the top 30% of men and they slaveowner/slave ruling system would be exposed