If you want to understand where Fallout 4 came from, and who Bethesda is - I can't think of a better presentation than what Peter Hines did at PAX Aus in 2014:
https://www.youtube.com/watch?v=MCYICHizwao
It takes an hour, but the whole thing is worth watching. It really will give you a better understanding of Bethesda.
Note: when Pete posted the Vault 77 strip, I tweeted him Thanks. He tweeted back... When is the last time a Vice President of a significant company replied to you in person?
Says quite a bit about him - and Bethesda.