The Huffington Post
Elizabeth Scharpf and Rachel Kauder Nalebuff
Posted March 8, 2009 | 12:26 PM (EST)

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Thatcher Mweu is a high school sophomore at Choate Rosemary Hall, a prestigious New England boarding school. Two years ago, she was living in a rural Kenyan village. Introducing the new class of 2011, Choate's headmaster told the school of its deepening diversity—there was a girl who had never been in an elevator before. What he didn't know is that Thatcher had never seen a tampon before, either.

Despite the fact that half the world menstruates, most people overlook the serious repercussions of a lack of affordable sanitary supplies in developing countries. The reason? Most people don't …

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