The analysis considered a wide variety of factors that impact safety—from crime rates to levels to air pollution.

The first 13 states listed below were the original 13 colonies. Their so-called statehood dates are the day they ratified the U.S. Constitution. For all other states, the date is the day the U.S.

The White House shines with rainbow-colored lights June 26, 2015, celebrating the Supreme Court's ruling that the Constitution guarantees a right to same-sex marriage in all 50 states.