Doctrine of Discovery

The Catholic church is rightly being vilified for inventing the doctrine of discovery - but none of the world's great powers can afford to smirk. All - including Britain and the USA - happily endorsed the idea, declared it to be international law and claimed it justified their seizure & rampaging colonisation of foreign lands & indigenous peoples.

I can't see what effect 'revoking' it would have except as a symbolic gesture. Maybe could be an attempt to de-'legitimize' future transgressions but I wouldn't count on it.