You can actually trace it to the 1970’s when traditionally male jobs in factories, mills and mines were being shut down by globalization. At the same time Feminism was telling women to go out and roar. So a growing percentage of guys have decided to sit home on the couch with a beer and let them.
In the business world women still seem to be the last in each morning and the first out each afternoon; they’re not dominating office jobs. They get toekn titles and salary (to fight off lawsuits), but I’ve only occasionally met women as bright as men.