Jan C. Behrends has published an article on violence and the state in the 20th century in Neue Politische Literatur, 58/1 (2013).
 
See his contribution "Jan C. Behrends, Gewalt und Staatlichkeit im 20. Jahrhundert. Einige Tendenzen zeithistorischer Forschung, Neue politische Literatur 58/1 (2013): 39-59.” here.