All is a group, yes. Humanity would be that group. There is nothing to reconcile. If there was a global constitution that all nations where held to, there would be more freedom for all
Would it be something countries opt into voluntarily? If not, what would be the consequence for non-compliance?
At this point it would be fine to remove governments that disagree. Voluntary is nice, but not required. Better it happen now then wait for the last dictators to agree.