When we’re in scientist mode, we refuse to let our ideas become ideologies. We don’t start with answers or solutions; we lead with questions and puzz… - Adam Grant

Thinking like a scientist involves more than just reacting with an open mind. It means being actively open-minded. It requires searching for reasons why we might be wrong — not for reasons why we must be right — and revising our views based on what we learn.

If you’re going to build a strong culture, it’s paramount to make diversity one of your core values. This is what separates Bridgewater’s strong culture from a cult: The commitment is to promoting dissent. In hiring, instead of using similarity to gauge cultural fit, Bridgewater assesses cultural contribution.* Dalio wants people who will think independently and enrich the culture. By holding them accountable for dissenting, Dalio has fundamentally altered the way people make decisions. In a cult, core values are dogma. At Bridgewater, employees are expected to challenge the principles themselves. During training, when employees learn the principles, they’re constantly asked: Do you agree? “We have these standards that are stress tested over time, and you have to either operate by them or disagree with them and fight for better ones,” explains Zack Wieder, who works with Dalio on codifying the principles. Rather than deferring to the people with the greatest seniority or status, as was the case at Polaroid, decisions at Bridgewater are based on quality. The goal is to create an idea meritocracy, where the best ideas win. To get the best ideas on the table in the first place, you need radical transparency. Later, I’m going to challenge some of Dalio’s principles, but first I want to explain the weapons he has used to wage a war on groupthink.

In these pages, I learned that great creators don’t necessarily have the deepest expertise but rather seek out the broadest perspectives.

We laugh at people who still use Windows 95, yet we still cling to opinions that we formed in 1995.