[Ichthypresbyter]

>I'd like to see a worldwide agreement that no country will ever stop a citizen from leaving, as long as they have permission to enter another country.

It's in the Universal Declaration of Human Rights. Article 13 Section 2:

>Everyone has the right to leave any country, including his own, and to return to his country.

Of course, it's not clear how much legal force the UDHR has.

[pc86]

> Of course, it's not clear how much legal force the UDHR has.

It's perfectly clear - zero, unless the violation is so egregious other countries are willing to go to war over it.

[bmmayer1]

> Of course, it's not clear how much legal force the UDHR has.

I think we all know the answer to this question :)

[tpm]

> Of course, it's not clear how much legal force the UDHR has.

Depending on the jurisdiction. It has a lot of legal force in countries that are members of the European Court of Human Rights (ECHR; violations go to that court if they are not satisified by local courts or other means of member states; member states usually respect the Court's decisions). Belarus applied for membership in 1993 but was never admitted, because well I think it's clear why.

[monksy]

> much legal force the UDHR has.

They won't enforce it, they won't even say anything. Upon request they'll even hand over the names of people of interest to regimes that wish to execute or torture innocent people. See the UNHRs response to handing over names of Uighurs.

https://www.aa.com.tr/en/americas/human-rights-whistleblower...

"it's not a problem"

https://www.aljazeera.com/news/2021/2/22/china-rejects-uighu...

When you're talking about exit bans, that's something China is known for, and it's gotten bad enough that the US State Department mentions it. (That was a long time coming)