Substance abuse and its social consequences are a major public concern for communities throughout the world. The motivations and consequences are deeply imbedded within the social and political structures of all countries, whether they be well-established democracies or developing nations.

Every culture shapes the meaning of and responses to substances such as marijuana and heroin over time and across locations, but the broader drug issue has become universal. As the sphere of the problem expands, the experiences and solutions of each nation become more relevant to other...