Luis Rafael de la Trinidad Otilio Ulate Blanco (August 25, 1891 – October 10, 1973) served as President of Costa Rica from 1949 to 1953.

He never married but had two daughters, Olga Marta Ulate Rojas (1937–2007) and Maria Ermida Ulate Rojas (1938) with Haydee Rojas Smith (British origins) [2] His disputed election in 1948, whereby he was denied victory by the legislature in favor of Rafael Ángel Calderón Guardia, was the direct cause of José Figueres Ferrer's armed uprising of that year and the ensuing 44-day Costa Rican Civil War.

Ulate led the opposition party during the February 8th 1948 elections, where he defeated ex President Rafael Ángel Calderón Guardia.

[3] His government proved a good handling of economical development, Ulate raised the Consejo Nacional de Produccion (CNP)-National Production Committee-, the Central Bank of de Costa Rica (main financial institution in Costa Rica), the Contraloria General de la Republica (regulates government and public institutions' budgets and expenses), the "Ley del Aguinaldo" (law that enforces a 13th month paid salary for all Costa Rican workers during Christmas time), the right for women to vote in National Elections and the foundations for the actual International Juan Santamaria Airport (called "El Coco"), despite the fact that many of his achievements were self-recognized by following presidents.

[5][6] As a result, for the first time in human history, a World Constituent Assembly convened to draft and adopt the Constitution for the Federation of Earth.