Timeline - the road to worldwide Cannabis legalisation & acceptance
1936 - reefer madness film released.
1969 - Gallup poll - 16% of Americans supported legalization
1972 - Nixon announces "War on Drugs"
1982 - "Just say no" campaign launched
1988 - UN convention makes it mandatory for signatory countries to establish drug production and sale as criminal offenses.
1996 - California passes initiative allowing medical cannabis use
2001 - July - Portugal turns possession from a criminal charge to an administrative charge.
2006 - Philippines no longer has the death penalty for trafficking drugs
2007 - David Nutt publishes controversial study in The Lancet which ranked Alcohol as more dangerous than Cannabis
2008 - February - Honduras President Manuel Zelaya calls on USA to legalise drugs to prevent violence.
2009 - "nice people take drugs" campaign launched
2009 - April - Drug Decriminalization in Portugal: Lessons for Creating Fair and Successful Drug Policies published by Glenn Greenwald
2009 - August - Argentina rules it unconstitutional to punish people for cannabis possession.
2009 - August - Mexico decriminalizes possession.
2009 - December - Czech Republic decriminalises possession
2010 - October, Actor Zach Galifianakis appears to smoke cannabis on US national television as a statement in favor of legalisation
2011 - June - Jimmy Carter: "excessive punishment" has "destroyed the lives of millions of young people and their families"; drug policy, he said, should be "more humane and more effective".
2011- June - Global commission on Drug Policy report: "The global war on drugs has failed, with devastating consequences for individuals and societies around the world"
2012 - May - US Drug Czar Gil Kerlikowske says War on Drugs "not successful"
2012 - September - Guatemalan President Otto Perez Molina, endorsed by former Mexican President Ernesto Zedillo and Colombian President Juan Manuel Santos, advocates drug legalisation to the UN General Assembly.
2012 - November - Residents of States Washington and Colorado vote to legalize recreational use of cannabis
2012 - December - Sir Richard Branson urges world leaders to decriminalise all drugs.
2013 - April - Pew Poll, 52% of Americans support legalisation, 45% oppose.
2013 - June - David Nutt: Drug laws amount to scientific censorship
2013 -July - Uruguay approves not just legalization but government regulation and sale of cannabis.
2013 - August - USA Attorney General Eric Holder says Department Of Justice will let Washington and Colorado laws go into affect.
2013 - November - USA - City of Portland votes to legalise cannabis for recreational use
2014 - January - U.S. treasury and law enforcement agencies will soon issue regulations opening banking services to state-sanctioned marijuana businesses even though cannabis remains classified an illegal narcotic under federal law.
2014 - February - United States President Barack Obama says Cannabis less dangerous than Alcohol
2016 - March - Liberal Democrat party in the UK advocates legalization of cannabis