G. di Gennaro Abuse of drugs has reached such magnitude that it is regarded by most govern ments, scholars, and experts as one of the major problems of present-day society. The highest values of individuals and social groups are strongly attacked or are at risk as a result of the spread of drug abuse. As a consequence, society is deprived of the contribution of many of its members toward the establishment of better condi tions of life. On the other hand, considerable portions of the limited resources of so ciety are diverted to assist, cure, and rehabilitate drug addicts. The enormous gains...