Culture isn't perks or policies — it's what a team on a mission looks like from the inside: "no company has a culture; every company is a culture." It compounds from two practices: hiring people who are excited to work specifically with you ("Why should the 20th employee join your company?") and giving every person exactly one thing they uniquely own ("make every person in the company responsible for doing just one thing"). Defined roles eliminate the internal competition for responsibilities that causes most company conflict — "Internal conflict is like an autoimmune disease."

— In our words · Source: Zero to One (Peter Thiel with Blake Masters)