Tracking performance in the for-profit world is simple; you have, well, profits. Plus tons of metrics and measurers and lists–from the Fortune 500 to the Forbes Rich list to further enshrine top performers. Without looking, you can probably name most of the top 10% of either of those lists. But which are the top social-good organizations? Who are the most influential leaders? What organizations have the most significant impact? Where do you even start?