USPI results are correlated against a large secondary dataset of economic, educational, health, demographic, and social capital factor, in order to determine the environments which are most closely associated with peace in the U.S.

The 2012 USPI is the second annual edition of the index and now includes a Metropolitan Peace Index (MPI) which includes measures of peacefulness in 61 metropolitan statistical areas within the U.S.

According to the 2012 USPI, the U.S. is more peaceful now than at any other time over the last twenty years; since 1991 there has been a substantial and sustained reduction in direct violence across the United States.

See the US Peace Index portal to engage with the interactive maps, download the report and see key findings from 2012.