I start to belive that it was all an elaborate plot by the Enclave. Put together some vault with the official purpose to save humankind from nuclear holocaust, but instead use them to study different aspect of human sociology to better understand how to colonize another planet. Val-Tech is indeed a big corporation and for that reason they do as the people who pay them says. My guess is that the Eclave plan was screwed by the actual war: they probably though nobody had the guts to launch a nuclear strike and used the "general" fear to leave the population in the dark of their plans, using the vaults, studying them and so on. Otherwise why create specifica vaults (music, overseer and so on) when you can't collect the data after a nuclear war? The adventures of the vault dweller, since the first fallout seems like a drop in the ocean. You realize how big the weight of history is as slowly you go through the story but in the end, who actually cares now? I just imagine to be the main character. How thing will change for him knowing why the vaults was built, the plans of the Enclave and so on? He need to survive as first thing and try to find his dad, then project purity ... It's like ... I don't know ... It's like HE does have more immediate and real problems to face than chase ghost of a 200 years past. PS. Vault 101 was sealed and ment never to be open ... We saw very few people in there, nobody stopped for a moment and though: gene pool? I don't want to start to talk about weird cuckold/bull stories but do the math and tell me :)