What are the causes of wars? Peace researcher Franz Jedlicka explains why he thinks there is only one: a lack of empathy. His theory is based on his analysis of legislations worldwide regarding the question in which countries, in fact, different forms of violence are still legal (Culture of Violence Scale). Scientific evidence comes also from the biography research of Sven Fuchs ( kriegsursachen.blogspot.com ) regarding the childhood of warmongers and terrorists (political psychology).