The Top 6 Book About The Causes of Conflict

1. The Great Leveler: Violence and the History of Inequality from the Stone Age to the Twenty-First Century –  Walter Scheidel
2. The Righteous Mind: Why Good People Are Divided by Politics and Religion – Jonathan Haidt
3. Violence: Six Sideways Reflections – Slavoj Žižek
4. The Professor in the Cage: Why Men Fight and Why We Like to Watch – Jonathan Gottschall
5. On Violence – Hannah Arendt
6. To Have or to Be? The Nature of the Psyche – Erich Fromm

Further Reading

1. The Anatomy of Human Destructiveness – Erich Fromm
2. On Aggression – Konrad Lorenz