Bruno Mastroianni. Philosopher, journalist, he works as a social media strategist for RaiPlay. He deals with online discussions, conflicts and crisis communication on www.brunomastro.itHe teaches effective communication courses for dissent and conflict management in universities, companies and non-profit organizations. Research fellow at the University of Florence, he teaches Theory and Practice of Digital Argument at the University of Padua. He wrote: “Arguing is learning. Defusing online hatred with happy disputes "(Cesati, 2020); “Keep it on. Post, comment, share without turning off your brain ”(with Vera Gheno, Longanesi 2018); “The happy dispute. Dissent without arguing on social networks, in the media and in public "(Cesati, 2017).