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. Some survivors like some of the ghouls in The Underworld survived by taking shelter in the metro tunnels, or similar underground shelters, and the brotherhood of steel in the west descend from US army personnel stationed at Mariposa military base, not a vault.