Diana Fleischman and Geoffrey Miller are a power couple who work as scientists in the evolutionary psychology field. They are notable for taking the topic of inceldom seriously as a life circumstance rather than a subculture, and promoting polyamory as a solution to the incel problem.
Opinion on incels
During a talk with Subverse News Archive, Diana and Geoffrey expressed their opinion that there has always existed a large amount of incels, including prior to the sexual revolution. However, both expressed the opinion that high inceldom-rates are destabilizing to society, and sometimes results in societal concessions to incels, in a "classical optimal skew" fashion. They also noted that sometimes governments just kill off their incels through war instead of offering concessions.
Their solutions to incels
Both Diana and Geoffrey believe that polyandry is unstable, and that incelizing polygyny is the most historically common form of polygamy. Nonetheless, both promote some form of non-married polyamory as the solution to inceldom, particularly one that involves some sort of societal contract around, "ethical polyamory".
Other solutions they proposed included decriminalizing prostitution, sex dolls, and/or VR sex.