So I've played Fallout 3 and new Vegas and I'm not sure if I missed it but my question is:
Is every who we see throughout the Fallout games and I mean every single person you meet in the wasteland FROM A VAULT?
Well I'm sure a lot of people survived the atomic blast by hiding in their own shelter or building or cave and repopulated the world but I wondering if like 50% or 90% of the world population in Fallout is from a Vault??
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Not everyone. There are a few cases, Brotherhood of Steel for one, that were in isolated places when the bombs went off. Some people survived, some turned into ghouls.