Consider the following two people:
Alice obsessively watches the news and feels horrified by the constant bad news she sees. She takes up smoking to deal with the stress, and experiences panic attacks.
Bob also watches the news, but he realises he can't do much to change anything on a national scale so he decides not to care and goes for a walk with his dog.
I am looking for a noun to describe Bob's attitude. Apathy could work but it has negative moral connotations. Is there a positive equivalent?