Book excerpt: Despite the past century's extraordinary advances in technology and scientific knowledge, today's world is still racked by economic insecurity, vast gulfs between rich and poor, violent conflicts, and daunting environmental problems. What's stopping us from building a world in which there's less inequality and more nurturing of the individual's potential to lead a satisfying life? Does the central role of self-interest in human nature necessitate economic arrangements that condemn us to living on a treadmill of consumerism and insecurity? Will the gap between rich and poor countries ever be bridged? These are the key questions that Brown University economist Louis Putterman's "The Good, the Bad, and the Economy" addresses in surprising new ways.