The best explanation on temperament I've read to date (7/2023). Sensitivity is a trait present in 20% of the populations of many species. Aron identifies traumatic experiences of highly sensitive people in aggressive (Indo-European) cultures and recommends support and interventions for the resulting patterns of hyperarousal and/or disconnection. She notes that what we often refer to as 'introversion' is a coping strategy for the HSP.