As I head to Vienna for a historic U.N. meeting on drug policy, I find myself reflecting on the pervasive influence of the United States on drug laws around the globe. The news of today, and of any given day, is permeated with tragedies and dramas that exist only because we, in the United States, have convinced ourselves and much of the world that prison and black markets are the best solutions to the human urge to ingest substances, despite (or perhaps because of) their powerful ability to alter brain chemistry. Walking [...] ...