Education between the Genders

Greg Mortenson, in The Commonwealth (Jan 2009), tells us a beautiful proverb about education:

If we educate a boy, we educate an individual. But if we can educate a girl, we educate a community.

He is the co-founder of Central Asia Institute, and the co-author of Cups of Tea. In smaller communities, especially poorer ones, Mr. Mortenson is indeed correct.