With more than $3.7 billion in assets and annual revenue of $800 million, the Nature Conservancy has generated staggering growth that would be the envy of any business. Incorporated in 1951 by a small circle of concerned ecologists, the Conservancy has grown financially into the world's largest environmental organization. It has one million members–up from 500,000 in 1990–and 3,500 employees operating in 50 states and 28 countries across the world. Nature's Keepers offers readers an...