Males can more easily wait till 40+ to have children.
Males don't have periods. If work hours are kept to a healthy level, both males and females can achieve those work hours averaged over a long time because there is sufficient time for rest. If sufficient rest isn't planned into the schedule, there isn't time for periods, and that culture unfairly favors males.
Males don't get pregnant, and are often looked down upon, or lose promotion and investment opportunities, for working less hours to help their pregnant or child-rearing partners. The males who set aside time for family are out-competed by males who either (a) don't value having a partner or children or (b) treat their family like crap by not being there for them. (I'm saying this from direct observations of acquaintances and friends.)
Males don't have periods. If work hours are kept to a healthy level, both males and females can achieve those work hours averaged over a long time because there is sufficient time for rest. If sufficient rest isn't planned into the schedule, there isn't time for periods, and that culture unfairly favors males.
Males don't get pregnant, and are often looked down upon, or lose promotion and investment opportunities, for working less hours to help their pregnant or child-rearing partners. The males who set aside time for family are out-competed by males who either (a) don't value having a partner or children or (b) treat their family like crap by not being there for them. (I'm saying this from direct observations of acquaintances and friends.)