Should we talk? This book treats this question, and many others, as beingempirical in nature: if we were to live through a given situation in 1000 par-allel lives, where in one half we talked and in the other half we didn’t talk,in which of the halves would we fare better?The results of such a thought experiment vary betweenRachel,Dimitri,andSteve– or any other conversation that we may ex…