Thanks, good summary. I wonder whether the "incel" phenomenon is new, or something just amplified by the new (dating app, social media, etc.) technology. Or alternatively perhaps whether incels have just become more visible because it's easier to form virtual communities that give voice to their members' pain and frustration. After all, as has been pointed out on this very site, most males over the long span of history failed to produce progeny. Doesn't that suggest involuntary celibacy is in some sense the norm for males? (It's also been suggested that monogamy largely righted that imbalance in modern times by making polygyny illegal or taboo.)