This is really naive. Let's take the 'no borders' situation - and throw in 'no drug regulation': 1) The immediate availability of narcotics would devestate th

This is really naive. Let's take the 'no borders' situation - and throw in 'no drug regulation': 1) The immediate availability of narcotics would devestate the country within a few months. The opioid epidemic is already causing great harm, and that's something that was actually contained initially within the confines of the American medical system: you had do have prescription, from a doctor, and access a controlled substance. And even then - it's bad. With fentanyl now available, which by the way, is the #1 drug of choice among recent opioid addicts because it's just 'much better' - we're seeing devestating results. A completely liberal free for all would mean all sorts of things: energy drinks, candy, food, would be embedded with various drugs. America is not 'burning man' - with mostly high responsible actors, doing stuff 'on the side' where it's not open, and not usually within 'arms reach'. Even the professionals who can 'handle their stuff' at burning man, were things to become as easy as coca cola to access, would fall under. Within about 5 months, 5% of the population would be addicted to meth or opiods, it would be a massive public health disaster of epic proportions. And while organized crime might not exist, petty crime would skyrocket. 2) "Texans love guns, so not sure why we'd want to prevent them from entering." Because guns are a controlled commodity for similar reasons. Every state has regulations. Do you want fully automatic machine guns, grenades, CS gas easily accessible to every baddie in America for a few dollars? It's absurd. 3) "Illegal migrants can also be deported after the fact" No, they can't. Illegal immigrants are not deported unless they have committed major crimes, because it's too expensive and politically untenable. 'Open Borders' would mean millions of people arbitrarily flowing into the US until the system was degraded to the point where there wasn't an advantage in coming to the US. When it has failed as badly as Brazil, well, people will stop coming. 4) It's really absurd that people think laws, borders, rules etc. don't matter and are somehow arbitrarily limiting. Those are part of the fundamental building blocks of civil society. Mexico is a broken state, the US is mostly a civil state, which is a delicate thing. One of the first things to happen with 'open borders' would be the Cartels themselves using it as an opportunity to corrupt American politicians. Money is a very powerful thing, unrestrained it would corrupt Arizona / New Mexico politics and Justice System relatively quickly and the dominoes would start to fall.