Separating the traits you gain when making a character into cultural and racial traits, this supplement will allow your Dwarf raised by Goliaths, or Halfling raised by Elves to be different from others of their kind. This adds an excellent amount of complexity but I cannot say that it's balanced. First, your entire table will need to use this, to ensure that no character is better or worse than the rest. The four star rating is due to the layout being difficult to view, the clarity of intent not being carried across all the time, and just the supplement not feeling very 5e.