nice point! mammal territorial anger is cooperative - go away or else. it can avoid an expensive fight. fear is backing down - i'll go. this communication is a

nice point! mammal territorial anger is cooperative - go away or else. it can avoid an expensive fight. fear is backing down - i'll go. this communication is a kind of cooperation. this explains the exhibition of some emotion, and argues that that's all it is. though, there are non-social emotions that are useful, eg hunger, fear of high places, enjoyment of warmth in cold weather.