Trauma-informed approach to historical memory and current tragedies

In 2026 our world is facing many social, political, economical challenges and there is an ongoing question: what can be done to resolve them and what can we do to restore ourselves after facing “major historical events” around ourselves.
Is it helpful to look at historical events as collective traumas? What are the ways to deal with social, political and economical consequences of wars, conflicts and genocides if we add trauma-informed perspective.
Are there success-stories and good experience in dealing with historical traumas and collective tragedies:
Dialogue,
Reconciliation,
Peace building
Peace education
Lessons learned from denazfication in Germany and if this can be somehow applied to a Russian invasion to Ukraine.