This issue of the journal contains a diverse set of articles. Through a case study of Turkey, Julide Yildirim, Tekin Kose, and Gizem Tanrivere examine the connection between terror attacks and reported feelings of individuals' happiness. Due to advances in data, variable definitions, and estimation techniques, J. Paul Dunne and Nan Tian revisit the econometrics of the "greed vs grievance" debate in Africa. Kjell Hausken and Mthuli Ncube consider theories of revolutions and civil war involving an incumbent, a challenger, and the population. Michael Brzoska proposes new avenues to help estimate countries' and global levels of armaments production. Finally, Jurgen Brauer re-examines how U.S. military expenditures are measured and proposes an alternative measure.