John Tierney reports in today's NYTimes science section that research seems to show gender differences are more evident in modern, progressive societies, and less evident in more "traditional" societies. If you're into the subject, it's a must read.
As for me, I'm not surprised (of course, how often does a supercilious blogger ever admit to surprise). A good part of the thing about modern society is there's more space for the individual, more room to "find oneself", to "self-actualize", or whatever other phrase is now current. That should mean there's more differences along all dimensions, not just the gender one.
Of course, that undermines the theory from the 1960's that a male-dominated society was responsible for creating the differences. Which may be why a semi-conservative like Tierney is open to these reports.