When Google set out to discover what makes a high-performing team in 2012, researchers expected to uncover a set of individual demographics, characteristics, or personality traits that made a team great. What they realized, however, was that it was the interactions of a team that determined its effectiveness. But while Google's Project Aristotle made the critical link between psychological safety and high performance, their research did little to teach leaders how to foster psychological safety on their teams. In this guide, we'll give you the practical tools you need to put Project Aristotle's findings into actual practice.