" Many psychologists use the term existential to describe the fact that all human beings are subject to painful events. These are the normal recurring afflictions that everyone suffers from time to time. Horrible world events, difficult choices, illnesses and periodic feelings go abject loneliness are common examples of existential pain. Existential calamities can be especially triggering for survivors, because we typically have so much family-of-origin calamity for them to trigger us into reliving. "

― Pete Walker , Complex PTSD: From Surviving to Thriving