Every year, more and more people begin to support the legalization of marijuana. We're seeing changes all across the country, as more than half of American states now allow medical marijuana. Four states voted in November to legalize recreational use.
Here's an even more startling set of numbers: According to a Gallup poll, 60 percent of Americans now support legalizing marijuana. In 1969, only 12 percent did.
So, how has the marijuana industry come so far since the '60s? And, just as importantly, why was there so much contempt for the drug then?
Start the slideshow to see 11 moments that helped shape the way we think about marijuana.