Is there a short catchphrase like "open borders" for "making more places on the globe better places to live”? The word is "colonialism" and it was moderately s

Is there a short catchphrase like "open borders" for "making more places on the globe better places to live”? The word is "colonialism" and it was moderately successful. But lets not kid ourselves - there were lots of abuses and it was very far from the utopia that I think you wish for. Due to nationalism and a desire to oppress their neighbors, most people would oppose this even if it makes their current vicinity better. Unfortunately this leaves the oppressed locals with no place to go.