Here is an interesting article from "The Independent" newspaper in the UK.

They are a fairly liberal paper and used to advocate for the legalization or decriminalization of marijuana. They no longer support that position and even seem to be apologizing for their previous stand on the issue....

http://news.independent.co.uk/uk/health_medical/article2368994.ece

The article states...

Quote:
The Independent:

The skunk smoked by the majority of young Britons bears no relation to traditional cannabis resin - with a 25-fold increase in the amount of the main psychoactive ingredient, tetrahydrocannabidinol (THC), typically found in the early 1990s. New research being published in this week's Lancet will show how cannabis is more dangerous than LSD and ecstasy. Experts analysed 20 substances for addictiveness, social harm and physical damage. The results will increase the pressure on the Government to have a full debate on drugs, and a new independent UK drug policy commission being launched next month will call for a rethink on the issue.
Maybe as new research keeps coming out, some governments will be rethinking their permissive policies regarding this drug.

It will never be completely legal in the United States. You can take that to the bank.