In the wild, why is constant, high-level aggression within the troop considered counterproductive to Uakari survival?

Answer

It would be metabolically costly

The energy required to process their primary diet and travel long distances suggests that constant, high-level aggression within the troop would be metabolically costly and counterproductive to survival.

In the wild, why is constant, high-level aggression within the troop considered counterproductive to Uakari survival?
behavioranimalPrimate