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I wonder why mood is so dependent on so many factors in order to form one emotion. It seems that mood is variable based on how you yourself want to feel, what medicines or other substances you are on, and your environment. Why would this be? I know we discussed this and decided that it allows you to see things from a new perspective but, what evolutionary value could that have? If you look at a tree when your happy versus when you are angry it is still the same tree.

Also, I wonder if we can discuss what happens with more extreme mood changes like severe depression or mania. Is it solely based on chemical alterations in the brain or is there and I-function/ environmental element to the creation of these problems?