Book excerpt: Discusses the intellectual processes involved in social planning. Professor Kahn provides critical tools for the analysis of the planning process, and shows what social planning is and can be. Clarifying the major phases in the planning process, he shows how planning can succeed or fail at any one of these stages. He examined planners in their various roles: as "neutral" technicians and as advocates, as representatives of interest groups and as public officials. The book describes both the social aspects of planning and the relationship between social and physical plans.