More government crackdown, smaller margins, more corruption....you can't take a dealer to court after all.
So, they need to settle things with guns. It's a profit making industry...and, when you look at US history, the homicide rate peaked during prohibition (when alcohol was illegal)....
...the other thing that some have argued that tipped the scales was 'medical marijuana' even the Heritage foundation claimed that if California legalized it completely that imported weed from Mexico would be reduced, as it'd be cheaper and more plentiful when grown in California.
If you want a better answer, though, you really should add some detail.
I was just wondering for knowledge purposes. i didnt really get the jist of it. thanks for the answer Jeremy! :)