I think that might work if I used common traits for different human races as suggested in bwg. I could then make the desired changes between the three races in discussion. I think Halflings are more akin to humans than Hobbits or Kinders (yes, I’m still going with all three as separate races) Hobbits have three sub-speci (just like the burning wheel elves) and each one seems to favor a different racial culture (elves, dwarfs, and humans). I do not see hobbits having any type of immunity to fear, neither do halflings (which appear in literature apart from dnd). Kinders, on the other hand, are known for being fearless (and kleptomaniacal, annoying, shrill voiced) they even held their own land