Like so many highly trained young women these days, Elizabeth Scharpf has choices. She could be working in a Manhattan office tower with her Harvard Business School classmates, soaring through the ranks as a banker or business executive, aspiring to become a C.E.O. There's no question that women enjoy opportunities that didn't exist a few decades ago. Yet those exerting the greatest pressure for change often aren't presidents and tycoons but those further down the pyramid, driven by a passion to create a better world. This kind of Do-It-Yourself Foreign Aid shows that it's not only high-ranking officials who chip away at global challenges. Passionate individuals with great ideas can do the same, especially in the age of Internet and social media.
