By Jessica Bennett
Once upon a time, marriage made sense. It was how women ensured their financial security, got the fathers of their children to stick around, and gained access to a host of legal rights. But 40 years after the feminist movement established a woman's rights in the workplace, a generation after the divorce rate peaked, and a decade after Sex and the City made singledom chic, marriage is, quite simply, no longer necessary. Ten figures that might make you think twice.