Since World War II, development projects have invested more than two trillion dollars towards health services, poverty alleviation, education, food security, and environmental initiatives around the world. Despite these efforts, 20% of the world still lives on less than $1.50 a day and the environment within which all live declines dramatically. There are clear limits to what further investments at this rate can achieve. This book advances the thesis that a more effective and universal foundation for social change and environmental restoration is not money, but human energy.

Using this...