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A six-member board of international analysts and academics determined the parameters of the measurements, which also tallied the prison populations in each nation, the likelihood of violent demonstrations, “perceptions of criminality in society,” the potential for terrorist acts and the “ease of access to small arms and light weapons,” among other things.

The GPI is also based on a secondary set of 33 indicators that plumb the finer points of the nations in question, gauging the quality of democracy, the strength of a nation’s institutions and political process, plus their religious, educational and cultural dynamics.

Mr. Killelea also has founded the Institute for Economics and Peace, a “global” think tank with a mission to parse out the relationship among economic development, business and peace.

“We’ve come up with a reasonable definition of peace, and one that can be measured in a numerical way. This idea has captured the imaginations of governments, researchers, philanthropists,” said Clyde McConaghy, president of the group.

The researchers ultimately hope to use all their sets of data to determine what “drivers” that may influence “the creation and nurturance” of peaceful societies.

The complete Global Peace Index can be viewed at