When Wikipedia was founded in 2001, the idea that people around the world could come together to create an accurate online encyclopedia covering virtually any topic seemed far-fetched. But today many people see the website as a trusted source of well-curated and -cited information. That's because of careful decisions that its leaders made about how to operate. Cofounder Jimmy Wales explains how introducing a simple purpose, insisting on certain rules of engagement, and other strategies helped the organization to build trust with contributors and users -- and maintain it even in a world bombarded by misinformation. Wales is the author of The Seven Rules of Trust: A Blueprint for Building Things That Last.