Clarification and understanding,"" as Mr. Campbell points out, are the two qualities most desperately needed in all areas of American foreign policy today, but probably nowhere are they more conspicuously absent than in our attitudes toward the Communist countries of Eastern Europe. These attitudes have never amounted to anything coherent enough to be termed a set of aims or policies; goals are limited by other pressing issues, strategy by the possibility of abrupt changes and their effects. Mr. Campbell, a senior research fellow with the Council of Foreign Relations and the author of several other books on the general subject, has provided as objective and concise an analysis of developments since World War II as could be hoped for, and has outlined the principal possibilities which are now and may in the future become available. The pivotal points such as the Sino-Soviet dispute and the German question, receive special attention. No easy answers nor solid grounds for optimism are offered, quite simply because there are none available.