Some info on Costa Rica:
Since the late nineteenth century, however, Costa Rica has experienced two significant periods of violence. In 1917-19, Federico Tinoco Granados ruled as a dictator until he was overthrown and forced into exile. Again in 1948, José Figueres Ferrer led an armed uprising in the wake of a disputed presidential election. With more than 2,000 dead, the resulting 44-day Costa Rica Civil War was the bloodiest event in Costa Rican history during the twentieth-century. Afterwards, the new, victorious government junta, led by the opposition, abolished the military and oversaw the drafting of a new constitution by a democratically-elected assembly. Having enacted these reforms, the regime finally relinquished its power in 8 November of 1949 to the new democratic government. After the coup d'etat, Figueres became a national hero, winning the country's first democratic election under the new constitution in 1953.
http://en.wikipedia.org/wiki/Costa_Rica
all in all seems a pretty nice place though.