What makes a team successful? If you guessed “the qualities of its members”, you’re wrong, but you’re in very good company. That was Google’s guess, too, when it launched a massive internal study of teamwork. As it happened, the skill sets or temperamental balance of the members did not correlate at all with team success as measured in terms of cohesion, productivity, and innovation. What mattered most was “psychological safety”. A “psychologically safe” team environment encourages equa...