A Martian Anthropologist writes:
You are a species both physically and psychologically dimorphic but you don't admit it.
You created a society full of interesting ways of spending time. Echoing an ancient hunter-gatherer division of labour, your males now play rough corporate team games while your females manage relationships in the caring public sector (I over-simplify, but not by much - look at the statistics).
Middle-class life opportunities: what joy for both sexes as compared with dreary family rearing! And then you invented contraception, so that the instinct for sexual intimacy was decoupled from reproduction.
Didn't it occur to you that similar methods were very successful in exterminating certain species of mosquito? I'm thinking of writing a paper for the Martian Journal of Evolutionary Psychology entitled 'Terran Capitalism as an Extinction-Level Event'.