sapiens

I think that his (Blanton's) whole mission is to drink makers mark and sell his book - another addition to the watered down psychology found in the self-help industry. I searched for empirical investigations of his methods using a number of research databases. I found none. I doubt that his actually improve anything. I still don't see how deception of others is necessarily bad for you. Nor do I see how radical honesty necessarily "contribute[s] to other people" as he suggests. How is this not a rehash of "Honesty is the best policy" with some personal anecdotes?

As I said in prior posts, I see no problem with radical honesty in particular contexts. I do agree with Analog, that there is a difference between saying

"You're fat"
vs.
"I resent how fat you are, because it makes me uncomfortable."

though I expect that the outcomes of such statements might be the same. I also think that the motives for using radical honesty as described by Blanton might themselves be self-deceptive.

I think that a world populated with people who are always radically honest is a fantasy (and wouldn't necessarily be a better world). I also think that he might sell more books if his concept was "super xtreme radical honesty" rather than "radical honesty".