Senator Jim Webb (D-Va.) introduced the National Criminal Justice Act of 2009 last week, an exciting piece of legislation that will create a commission to study, among other things, America’s war on drugs. The commission will look broadly at criminal justice reforms, with an emphasis on reducing America's rising prison population (now the largest in the world per capita). Centered in that debate is the hard truth about America’s punitive drug laws. One-third of U.S. inmates are drug offenders, and…