system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why the US has in interest in keeping drugs illegal in other countries.

I see it a lot. I know it has to do with trade agreements and whatnot, but what does the US stand to gain from something like pressuring a harm reduction heroin clinic in Europe to be closed?

Edit: fucked up the title, first in should be an.
gpt
If those drugs that the American government doesn't want Americans to use become more available anywhere in the world, they will also become more available in America, since it will be easier for people to obtain them in other countries and then smuggle them into the US.  The concern about a harm reduction heroin clinic in Europe is somewhat hard to justify, but even so, any tolerance of drug use by anybody anywhere for any reason is conceived (by the anti-drug establishment) to create a bad precedent which will eventually lead to mass, out of control drug use by American school children.