Miss Eul, please read Debra Soh on this same site.  It has science, references to research and such things.  Prison populations across the globe are predominantly male, doesn't mean there aren't good guys out there.  Some careers attract more men, doesn't mean women aren't excelling in these fields as well.

Seems like universities are graduating many more women now so I suspect we'll see changes in jobs historically populated by men in the coming years.