International Historical Statistics (Palgrave Macmillan)
Provides access to statistics covering a wide range of socio-economic topics. It is a collection of data sets taken from hundreds of disparate primary sources, including both official national and international abstracts – back to 1750. The new online edition provides updated statistics to 2010.
Global Terrorism Database An open-source database including information on terrorist event around the world from 1970 to 2017.