What is the meaning of "reality" at the end of Gilbert's discussion of our "psychological immune system"? What exactly is it that this system is designed to protect us from? Is the psychological...

What is the meaning of "reality" at the end of Gilbert's discussion of our "psychological immune system"? What exactly is it that this system is designed to protect us from? Is the psychological immune system analogous to our biological immune system, or does it operate according to a different logic? ls the reality from which this system protects us ultimately an illusion? Or arc psychological realities fundamentally different from material realities?