Pretty good article. I think everyone could do with a little less pathologization of a lot of human behaviour. My wife has suggested in the past that we have another wife so that we can have more children[0]. I'm amenable to the idea but the logistics of this seem hard to me: our finances are fused, our desires are mostly unified, and it took me many years to find someone with whom this was easy to do. A two-party marriage like mine is straightforward for us both. There is a natural Nash equilibrium in responsibility splitting. We do so without explicit handling and simple nudges one way or the other suffice to recalibrate. I imagine long-term polyamorous relationships are easier to handle for people who have more explicit procedures in interaction or who are more comfortable with the uncertainty.

If there's an equivalent article which focuses more on the machinery of long-term polyamorous relationships that would be interesting.

0: It's not that we're old but that we will be old by the time we're done.