Susan Patton never questions the norm that women should "marry up" -- and by extension, men should marry "down" -- on a variety of dimensions, including education, accomplishment and age. (Nor does she question the assumption that mate choice is universally heterosexual, but that is a topic for another debate.) Yet a thorough gender revolution means questioning such assumptions about how women (and men) select a life partner.

CNN: Women, don't marry young