Peter Attia

Trauma generally falls into five categories: (1) abuse (physical or sexual, but also emotional or spiritual); (2) neglect; (3) abandonment; (4) enmeshment (the blurring of boundaries between adults and children); and (5) witnessing tragic events.

Trauma, big T or little t, means having experienced moments of perceived helplessness.

The most important thing about childhood trauma is not the event itself but the way the child adapts to it.