By Melani O'Leary, Carolyn Macdonald and Bridget Aidam

Grandmothers across the globe play a far more important role than the go-to babysitter on date night. As it turns out, we've learned that grandmothers are vital to not only caring for young children but also advising and educating younger women in their communities on all aspects of family well-being. Interestingly, in the developing world, the influence of grandmothers even extends to the men in their...