Here is Alan Ehrenhalt’s NY Times review of Charles Montgomery’s Happy City.

people have been shown to be happier when they live a connected life, establishing casual but regular relationships with the people they meet through simple residential proximity. In Montgomery’s opinion, casual friendship is a necessary corrective to the intensity of nuclear family life, and urban design choices are absolutely essential to it. ‘The power of scale and design to open or close the doors of sociability,’ he writes, ‘is undeniable.’ ”