Non-violent communication is the intellectual heir of E-prime which was the heir of semantic concerns in General Semantics. Recent books on the subject are well reviewed. It is a useful tool in communicating across large value rifts.
Does Rosenberg cite Bourland (or Korzybski) anywhere? I thought these were independent inventions that happened upon some tangential ideas about non-judgmental thinking.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.