If there are, &quot;significantly higher levels rape, kidnapping, murder, assault, robbery and fraud in polygynous cultures&quot; and going to monogamy reduces these, then I wonder what happens if we turn that dial even further? What happens when society moves towards polyandry?<p>Polyandry had particular high logistical costs for most of our history, because of childbirth. However, birth control technology has developed to the point where such arrangements are now practical. My current girlfriend and various women I knew in college have reported to me encounter frequencies of 3X per day during their 20&#x27;s, along with their male partners at the time basically complaining of that rate being &quot;unsustainable.&quot; It may well be possible for certain women to be able to sustain polyandrous relationships, and for them to benefit from such relationships while acting as a moderating force in society. (The &quot;Attila&quot; stories by Antonio Sequra and Jose Ortiz have a character who engages in this arrangement in a post apocalyptic world. In the stories, the polyandrous arrangement also serves as a small military force, highly motivated to protect its leader. These stories are probably NSFW, so no links posted here.)<p>Oddly enough, a there is a very &quot;easy&quot; legal&#x2F;social framework for allowing the establishment for what is effectively a &quot;loosely bound&quot; polyandry: legalized prostitution. Of course, &quot;easy&quot; is in quotes, because, while the legal framework would be very straightforward, the political and cultural barriers to passing the enabling legislation are huge. Also, only a subset of the activity enabled by such legislation could be fairly called a &quot;loosely bound polyandry.&quot;<p>EDIT: If we note the prevalent pattern of human behavior, humans are pretty much &quot;serially monogamous&quot; -- where our attentions are mostly, but not exclusively, given to one particular partner at a time. However, the state of nature seems to indicate a pattern of having secondary and tertiary partners or transitory dalliances as well. Given the availability of effective birth control and mechanisms for preventing the spread of sexually transmitted disease, we are probably overdue for a reshaping of societal norms to better fit the actual historical behavior of &quot;monogamous&quot; people.<p>EDIT: I was informed that polyandry was practiced, so was possible before modern birth control.