I used to think that all educated adults had read the same books about history I had, but I was surprised when I was in law school that my professor of criminal law and criminal procedure had never heard about why drug laws in east Asia and southeast Asia are very harsh. The painful experience of China after defeat in the Opium Wars means that several countries of Asia view promotion of drug use among their populace as an instrument of foreign colonialist oppression. The zero-tolerance policies (including the death penalty for possession of quite small amounts of prohibited drugs) in those countries flow directly from a historical experience in which a drugged population became easier rather than harder to oppress. On historical grounds, and on observation of the Grass Roots Party (a political party in my state supporting legalization of marijuana), I'm not at all sure that easier access to drugs makes a populace happier or more free.