To sell their books as best-sellers? The scientific study Matthieu Ricard participated 20 years ago with Richard Davidsons group: https://pubmed.ncbi.nlm.nih.gov/15534199 was summarized by Matthieu Ricard in this video: Where we manipulated by Matthieu Ricard to sell his best-selling book “Happiness”? 20 years after Richard Davidson s and Matthieu Ricard studies started brain scientist Peter Gamma …