Department A needs department B, and B needs A if they both want their company to succeed. If one of them fails, the whole company fails.
They both know this. But A’s manager does not talk B’s manager. They don’t like each other, or think they don’t, or something happened last month, or last year, or … So their subordinates make ends meet, talk to each other, manage themselves, get things done. The rest of the swarm mends the communication channels, the tribe survives despite the chiefs.
These situations are more commonplace than one might think. And they do not happen only in companies, but – think about it – right inside your head.