The Center for Systemic Peace has numerous Web pages with historical information related to political stability and changes in regimes.
Adverse Regime Changes in Africa 1955-2004 http://www.systemicpeace.org/africa/ACPPAnnex2a.pdf
Coup d’Etat in Africa 1946-2004 http://www.systemicpeace.org/africa/ACPPAnnex2b.pdf
Major Periods of Armed Conflict in Sub-Saharan Africa 1946-2004 http://www.systemicpeace.org/africa/ACPPAnnex1a.pdf
Polity IV Project Political Regime Characteristics and Transitions 1800-2007 http://www.systemicpeace.org/polity/polity4.htm
Description of the Center for Systemic Peace
The Center for Systemic Peace (CSP) was founded in 1997. It is engaged in innovative research on the problem of political violence within the structural context of the dynamic global system, that is, global systems analysis. The Center supports scientific research and quantitative analysis in many issue areas related to the fundamental problems of violence in both human relations and societal development. The focus of CSP research is on the possibilities of complex systemic management of all manner of societal and systemic conflicts. The Center regularly monitors and reports on general trends in societal-system performance, at the global, regional, and state levels of analysis and in the key systemic dimensions of conflict, governance, and (human and physical) development. The Center is now affiliated with the Center for Global Policy at George Mason University.