All developed, and almost all developing, societies are grounded in the continuity of a very specific male mindset. It is best described as a scenario where the vast majority of guys will slave away, sacrifice and generally endure abuse for a reasonable chance at getting some mediocre pussy, some respect and children. While that scenario played out very well in the age before effective contraception, feminism, unstable jobs and social atomization- that is no longer the case. The average woman thinks she is too good for the average guy and can even profit from such behavior. While men from older generations still believe in the validity of the older ways, the younger ones clearly do not and hence are far less likely to be married or in LTRs. It is hard to believe something if you can see evidence to the contrary at every turn and almost none to support it.