I find this part on page 35 very important:

"The Three Pillars of Social Interaction So, if teamwork is the best route to producing great software, how does one build (or find) a great team?

[...]

They’re the foundation on which all healthy interaction and collaboration are based:

Pillar 1: Humility

You are not the center of the universe (nor is your code!). You’re neither omniscient nor infallible. You’re open to self-improvement.

Pillar 2: Respect

You genuinely care about others you work with. You treat them kindly and appreciate their abilities and accomplishments.

Pillar 3: Trust

You believe others are competent and will do the right thing, and you’re OK with letting them drive when appropriate.