This document discusses how to build and sustain tribal unity within organizations. It advocates creating awesome self-selecting teams with a shared mission and identity. Teams should have daily communication, visual work tracking, and inspect and adapt processes. Multiple teams can form an awesome tribe through shared experiences like regular social events. Leaders must connect with the tribe and serve its needs. An intentional culture of trust and vulnerability can help people feel safe to be themselves at work. Maintaining unity requires focusing on these cultural aspects of teams and tribes over time.