It's not a theory, it's a well established fact that you can easily find on Wikipedia:
"The permanent members were all allies in World War II (and the victors of that war)"
https://en.wikipedia.org/wiki/Permanent_members_of_the_Unite...
"The permanent members were all allies in World War II (and the victors of that war)"
https://en.wikipedia.org/wiki/Permanent_members_of_the_Unite...
You can't debate me about a premise introduced by another person.
You have to resolve the issue with them.
I already made a comment that is based a premise (dudul's) that seems similar to yours, instead of belter's. Here:
Go back and argue with the person who actually introduced what you want to dispute.