Vermont ranks second in the nation for being most peaceful, according to the recently released peace index calculated by the Institute for Economics and Peace. Maine has been the most peaceful state for 11 years, making the Northeast America's most peaceful region. Louisiana is the least peaceful state, 20 years running.
According to the Institute for Economics and Peace, the United States Peace Index (USPI) is the first national peace index and is the only statistical analysis that offers a comprehensive nation-wide measurement of crime and its costs to all 50 states.
The index uses five key indicators to measure peace: the number of homicides, the number of violent crimes, the incarceration rate, the number of police officers and the availability of small arms.
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.