Cannabis is already completely legal in a number of US States. In Portland, Oregon there is practically an embarrassment of retailers. Further, one can buy a pen-sized vaporizer which contains concentrated cannabis resins in a variety of fruity flavors, and enjoy your habit pretty much anywhere in public. So far, I don't get the impression that legalization has affected the society here much. It doesn't really rise above the background levels of weirdness here, anyhow. I believe that most other instances of cannabis legalization have been similarly non-newsworthy.
And on the subject of drug availability, I'm aware of a few remote Alaskan towns where it's difficult to obtain drugs. I'm sure that there is some more developed and less isolated region of the world where it is also difficult to get such things, but that's probably not the common case. There is a global demand for such things, and there's only so much you can do to restrict the supply. Regardless, people will still find ways to get high. In the Alaskan towns I mention, bored teens will 'huff' paint fumes instead. There's not really a winning situation there; we can only minimize harm.
And on the subject of drug availability, I'm aware of a few remote Alaskan towns where it's difficult to obtain drugs. I'm sure that there is some more developed and less isolated region of the world where it is also difficult to get such things, but that's probably not the common case. There is a global demand for such things, and there's only so much you can do to restrict the supply. Regardless, people will still find ways to get high. In the Alaskan towns I mention, bored teens will 'huff' paint fumes instead. There's not really a winning situation there; we can only minimize harm.