The Global Peace Index for 2009 suggests the world has become slightly less peaceful over the past year. Rapidly rising unemployment, economic issues, and political instability in many countries have negatively impacted peace levels according to the index's methodology and indicators. The index ranks 144 countries on their relative peacefulness using 23 qualitative and quantitative indicators across three categories: ongoing conflict, safety and security, and militarization. Experts developed the methodology to provide a comprehensive yet concise analysis of global peace levels and determine factors that help create more peaceful societies.