We can just look at the results: "one of every three black American males born today can expect to go to prison in his lifetime" (https://en.wikipedia.org/wiki/Statistics_of_incarcerated_Afr...)

Just apply the standards we'd use for any official enemy nation. The US jails more of its own populace than anyone else. For many people, the US is effectively a police state. Highly effective outcome of the drug war: social control of certain population segments.

We can research who's been targeted historically: Irish (and other) immigrants by alcohol prohibition. Mexican immigrants by marijuana prohibition. (http://www.pbs.org/wgbh/pages/frontline/shows/dope/etc/cron....)