Intergenerational trauma refers to the apparent transmission of trauma between generations of a family. People who experienced adverse childhood experiences growing up, or who survived historical disasters or traumas , may pass the effects of those traumas on to their children or grandchildren, through their genes , their behavior, or both, leaving the next generation susceptible to anxiety , depr
Why Does Intergenerational Trauma Develop?
Understanding what causes intergenerational trauma is essential for prevention and treatment. Research consistently shows that intergenerational trauma arises from a complex interplay of biological, psychological, and social factors — rarely from a single cause.
What Researchers Have Found
Research into intergenerational trauma has identified multiple contributing pathways. Studies using neuroimaging, genetics, and longitudinal data reveal that no single factor fully explains why intergenerational trauma develops.
Biological Factors
Biological contributors to intergenerational trauma include:
- Genetics: Family history increases risk; certain genes influence vulnerability
- Brain chemistry: Neurotransmitter imbalances (serotonin, dopamine, norepinephrine) play key roles
- Brain structure: Differences in the prefrontal cortex, amygdala, and hippocampus are documented
- Physical health: Chronic illness, hormonal changes, and sleep disruption can trigger or worsen intergenerational trauma
Psychological Factors
- Early experiences: Childhood adversity, attachment disruption, and trauma shape psychological vulnerability
- Cognitive patterns: Negative thinking styles, perfectionism, and rumination increase risk
- Coping skills: Limited emotional regulation skills make intergenerational trauma more likely under stress
- Personality: Certain traits (neuroticism, harm avoidance) are associated with higher risk
Social and Environmental Factors
Environmental Influences
The memories of a traumatic experience stay with the individual who experienced it; the worldview it created in them, however, can be inherited by their children. Even young children, research has shown, detect and react to their parent’s anxiety cues. Studies of Holocaust survivors have found that while many resisted talking to children about their experiences, their worldview—that the world was a dangerous place where terrible things could happen at any time—affected their children’s outlook as well. The mechanisms are still being studied. One way is that people who have experienced signific
What Triggers an Episode?
Even in people with predisposing factors, intergenerational trauma often requires a triggering event:
- Major life transitions (job loss, relationship breakdown, bereavement)
- Prolonged stress without adequate recovery
- Substance use or withdrawal
- Physical illness or injury
- Social isolation or conflict
Protective Factors
Not everyone with risk factors develops intergenerational trauma. Protective factors include: strong social support, effective coping skills, physical health maintenance, access to care, and psychological resilience built through prior challenges.