Any attempt to make Christianity a vital force in social improvement is apt nowadays, surprisingly enough, to involve controversy and opposition. There are strong forces in this country that are highly suspicious of ""social action"" on the part of the churches. Anyone exhibiting a great concern for the underpriviliged is likely to find himself tarred as a communist or a fellow-traveler. This book, however, proceeds on the assumption that unless churches have some real effect upon social conditions they will find themselves ineffectual as institutions and with a program and message absolutely irrelevant to the needs of the world. The author rightly deals primarily with the program of the local church in its own community. Out of his experience in this field Professor Seifert outlines the bases and procedures of community action bearing on social, economic and political problems. Community- minded Protestant pastors and leaders will find this book most helpful. Others may be thereby stimulated to action.