Evergreen is a fortnightly business newsletter by Eric Jorgenson compiling great articles around a specific topic. The current edition is around company culture. It contains so many great insights and anecdotes, including this bit

When Facebook first started to grow, Mark Zuckerberg spent time asking other CEOs about some of the things they did early on at Microsoft, Apple, and others to establish culture and explain to people what it meant to work there. One of the best pieces of advice he got was to write down a succinct list of what it meant to be “one of us.”

Source: Most Company Culture Posts are Fluffy Bullshit — Here is what you actually need to know