Óscar Arias Sánchez is a Costa Rican politician, activist and Nobel Peace Prize laureate who was the president of Costa Rica from 1986 to 1990 and from 2006 to 2010. The Nobel Peace Prize 1987, announced October 13, 1987. Oscar Arias Sánchez, “for his work for lasting peace in Central America”. Oscar Arias Sánchez: born 1940, Heredia, Costa Rica. Wiki link Data: the Nobel Foundation (CC0).