@bastianallgeier For context, heavily controlled borders were a 20th century invention. Up to the success of the eugenicist movement in USA, it was fairly common for European people to just wander around, or move to new places, and no political authority particularly minded (with the exception of enslaved people, which was only ultimately abolished with the issuance of the Emancipation Manifesto of 1861by the last remaining absolute monarch of Europe, who also happened to rule the last European country where slavery was legal, Alexandr II of Russia). Borders used to be about preventing hostile military from corssing into a country's claimed territory.Unfortunately, after WWI, the eugenicists' anti-immigration ideas led to a series of countries establishing civilian immigration controls, and while these were relatively mild in the beginning, they had become quite a serious issue for refugees by WWII. Much of the Displaced People's mess after WWII would have been a lot easier to handle if there hadn't been the immigration control bullshit in the way.