Publications, Lectures and Other Stuff
This is a comprehensive GLOBAL STUDY ON HOMICIDE 2013: TRENDS, CONTEXTS, DATA produced by the UN Office on Drugs and Crime in Vienna:
Slate provides a short commentary, but I would advise you to look at the original study (http://www.slate.com/blogs/the_world_/2014/04/11/the_world_s_murder_capitals_just_a_handful_of_countries_account_for_most.html)
Apart from providing detailed regional and national homicide statistics, the Study categorizes different kinds of homicide; identifies factors which seem to make homicide more or less likely; discusses the relationship between homicide and wider patterns of violence and conflict; examines criminal justice responses to homicide; and delineates problems of data collection and methodology.
As I note in the section on the rise of statistical understanding in the Social Sciences in my history of social thought course, the development of reasonably accurate statistics has enabled us to see the social world in new ways, identifying patterns and trends and accenting regional and national differences in life chances and opportunities,