Baumard, N. & Chevallier, C. (2015) The nature and dynamics of world religions: A life history approach. Proceedings of the Royal Society of London B
282:20151593. doi: 10.1098/rspb.2015.1593.
Baumard, N., Hyafil, A., Morris, I. & Boyer, P. (2015) Explaining the axial age: How energy capture favored ascetic wisdoms and moralizing religions. Current Biology
25:10–15. doi: 10.1016/j.cub.2014.10.063.
Burke, M., Hsiang, S. M. & Miguel, E. (2015) Climate and conflict. Annual Review of Economics
Hsiang, S. M., Burke, M. & Miguel, E. (2013) Quantifying the influence of climate on human conflict. Science
341(6151):. doi: 10.1126/science.1235367.
Richards, P. (1999) Homicide statistics, Research Paper 99/56, Table 1. House of Commons Library.
Statistics Bureau, Ministry of Internal Affairs and Communications (2016a) Population and households: 2-1. Population by sex, population increase and decrease, population density (1872–2009). Accessed May 7, 2016. Available at: http://www.stat.go.jp/english/data/chouki/02.htm.
Statistics Bureau, Ministry of Internal Affairs and Communications (2016b) Justice and police: 28-1. Penal code crime cases known to the police and cases cleared up by type of crime (1924–2004). Accessed May 7, 2016. Available at: http://www.stat.go.jp/english/data/chouki/28.htm.
United Nations Office on Drugs and Crimes [UNODC] (2016) Crime and criminal justice (2008–2012). Accessed May 7, 2016. Available at: https://data.unodc.org/#state:0.