While eschewing emotion - and its companion, vulnerability - Obama should be careful not to sacrifice empathy, the 'I feel your pain' connection that sustained Clinton. This connection is the shorthand people use to measure their leaders' intentions. If people believe you're on their side, they will trust your decisions.

As women slowly gain power, their values and priorities are reshaping the agenda. A multitude of studies show that when women control the family funds, they generally spend more on health, nutrition, and education - and less on alcohol and cigarettes.

Many differences are rooted in biology and reinforced through culture, so it's important to acknowledge that. Because if you say men and women are the same and if male behaviour is the norm, and women are always expected to act like men, we will never be as good at being men as men are.

That's not to say that women's priorities are better than men's. Rather, when women are empowered, when they can speak from the experience of their own lives, they often address different, previously neglected issues. And families and whole communities benefit.

You can't leave out half the world's experience and expect to address all the problems. Women communicate differently and process information differently, which leads them to resolve conflicts differently.