Society could be cured as a neurotic is cured in therapy, by getting in touch with repressed feelings and processing them. Part of what is true about this half truth is that insofar as anger is a raw emotion, closely connected with fear, getting in touch with anger is getting in touch with energy. Anger is energy. But anger is more than energy.
Anger is a moral statement.
Anger is typically directed at a person or group, who is blamed. That society, not nature, teaches us what our raw emotions mean, is proven by the fact that although people everywhere react angrily to being insulted, what is felt as an insult varies. As our society is now, our own moral sentiments are part of the problem. We need a better sense of right and wrong, one that produces more cooperative behavior, one that produces more harmony with the earth and its living systems. Expressing the angry sentiments that our culture validates is not good enough, because our culture is not good enough.