JeffB
Legend
The transition to 2e, 4e and 5e, I believe, are the only editions that provide a story justification for mechanics and Class changes.
There is stuff in 3e too. SKR wrote up some nonsense about dwarves making a comeback in birth rate and now even becoming wizards, in the 3E FRCS to explain the transition from 2E. Subtle things, but rule changes justified with "story" is sprinkled throughout the book.