Lawless violence in the developing world is a plague that undermines efforts to end extreme poverty.
Excerpts and reviews of top books on social innovation
Meeting the world's growing demand for water will require advances in technology that build on 3,000 years of progress.
An emerging "data-driven" science of human behavior promises to help us understand and solve social problems.
The art of expanding an organization is less about aiming high than about "grinding it out."
The new book Scarcity provides critical insights for designing better anti-poverty programs, but not for allocating scarce philanthropic resources.
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The movement to reform public schools through competition and testing is a "hoax," according to a one-time promoter of the movement.
Urban leaders offer a model for tackling big global problems that nation-states are failing to address.
The founder of the Worldwatch Institute and the Earth Policy Institute pursues an unfinished agenda.
There's money to be made by selling "ruthlessly affordable" products to the world's 2.7 billion poorest people.
Investment in "hyperdense" cities is, according to one writer, the key to solving many problems that afflict US society.