It doesn’t matter which two teams.
It starts immediately and unconsciously. To some degree the integration of teams around a common goal inevitably produces an Us vs. Them dynamic. This split creates division over perceived effort, talent, recognition, praise, conflict resolution, inclusion, and commitment.
Exceptional leadership can bridge these gaps and unify teams for a larger purpose. But exceptional leadership by its very definition is a scarce resource.
How does everyone else resolve this challenge? And what can I do with my own team?