I want to add that helping out someone with low morale seems like a very high impact intervention to me, if you are in a good position to help! Low morale predicts even lower morale, both because there is likely something in the environment causing it, and because you have less desire to act or contribute effort, which starves you of positive rewards. In that regard, it is similar to depression, but far more people are in position to help someone with morale rather than with treating depression, by rewarding someone neglected fairly for their contributions.
I want to add that helping out someone with low morale seems like a very high impact intervention to me, if you are in a good position to help! Low morale predicts even lower morale, both because there is likely something in the environment causing it, and because you have less desire to act or contribute effort, which starves you of positive rewards. In that regard, it is similar to depression, but far more people are in position to help someone with morale rather than with treating depression, by rewarding someone neglected fairly for their contributions.