The states complained that Colorado's establishment of a legal, regulated market caused marijuana to flow into their states, thereby undermining their strict laws. This, they claimed, caused "irreparable injury" by draining their treasuries, placing stress on their criminal justice systems and endangering the health of their residents.
After decades of reinforced negative stereotypes and propaganda the key to legalizing cannabis lies in education, and a commitment to steadily changing peoples' attitudes. In every state in the country that has some form of legal cannabis this has meant medical legalization first, not only to give some patients some relief, but also because that's what could pass.
Marijuana is now the nation's fastest-growing industry. The legal marijuana industry brought in $2.4 billion last year, so it's certainly no longer any sort of laughing matter. That figure represents an increase of a whopping 74 percent in one year's time, and it is estimated that the total legal market could be worth $11 billion as soon as 2019.