I would lmao because such a thing would never fly if it were not the will of the people. If some sort of global dictator tried to ban all religion it would create a massive international insurgency like nothing the world has seen before.
If the population as a whole gradually became more atheistic and decided to abandon their deities and religions on their own, then there would be no major reaction from anyone. Everyone would just shrug and go about their business.
Precisely, Elsewhere. No organization, UN or otherwise, would attempt to outlaw religion for fear of the backlash it would cause worldwide. We would truly be living in a scary place. If, OTOH people did gradually become more atheistic, to the point to where such a thing COULD be acceptable, there would be NO NEED to outlaw religion.
I, (for the most part), am atheist, but believe very strongly, that people are entitled to their beliefs. The worst possible "religious" scenario would be a religion of "outlawed religion".
j