The document discusses research on the relationship between childhood trauma and the development of borderline personality disorder (BPD). It summarizes that research has found childhood trauma, such as abuse, neglect, parental loss or divorce, is very common in those diagnosed with BPD. Events like 9/11 that caused trauma through parental loss could potentially increase BPD diagnoses later in life. The document concludes that childhood trauma interrupts healthy attachment and increases the likelihood of a BPD diagnosis, though more research is still needed.