An interesting, if imperfect, example of how drug policy could look around here, considering that the U.S. is home to 5% of the world and 25% of its prisoners.
Infographic via the honorable and ever-vigilant Narco Polo.
Comes complete with the research [Greenwald (2009)]
An article in Time, good for facts like "Proportionally, more Americans have used cocaine than Portuguese have used Marijuana."
Portugal's success story in Scientific American, good for all pop sci reporting.
an Official report from the Beckley Foundation (the most carefully weighed argument I've read so far)
And of course, the Wiki