Illinois is one of the least peaceful states to live in. That's according to a recent study conducted by the United States Peace Index, which ranks the state 35 out of 50. The ranking is based on a set of five indicators, including homicide rates, violent crimes, percentage of the population in jail, number of police officers, and availability of small arms per 100-thousand people.

All of Illinois' border states ranked higher on the peace scale, except Missouri, which comes in at number 42. The good news is overall peace in the U.S. has improved by eight percent from 1995 to 2009. This improvement was driven by a substantial decrease in homicide and violent crime rates.

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