Is withdrawing from people a form of healing, or a form of protection that can become permanent?

Why might some people not feel haunted by traumatic memories, while others do? What makes the difference in how they cope?
What does it mean if someone can learn by self-instruction, and how can you develop this ability?
What does "compatibility" mean to a narcissist when they're deciding on a new partner?
What are some stories or experiences that have convinced people to keep a gun close by at all times?