IRVING LEVESON The 19608 was a period of rapid social and economic change, coupled with spectacular growth in the role of government in dealing with social issues. The demands of public programs and policies created enormous pressures for improved information and analyses. In the field of drug abuse these pressures were compounded by the rapid rise of drug use and the absence of much critical information and analysis. The most elementary steps to develop a data base were just beginning, and many years of effort would be required before the accumulation of knowledge could produce. a strong...