Basically, the science shows that unhappiness among women correlates with having more options. Which probably shouldn’t come as a massive surprise to you this far in. “Having it all”—career, kids, access to the rowing machine at the gym—has come with the pressure of feeling that we have to “do it all.” Women have got it into their heads that they should be able to do it all. And in perfect balance. And this has resulted in more stress and less happiness. (I speculate that men are feeling the same but it’s just not reflected in the research yet.)