King Bhumibol expressed his will that Mahidol University should also expand to the Social Science fields, so the Faculty of Social Sciences and Humanities was founded in 1969. The construction of Salaya campus began in 1975 but was soon delayed due to the political situation and financial shortage. On July 23, 1983, the Salaya campus was officially opened. All education for freshman-year students was transferred to Salaya. Later academic developments of the university tended to deviate from traditional Health Science area to facilitate academic demands of the country and later developments were centered on the Salaya campus. The first internship college in Thailand was founded in Mahidol in 1986. In 1999, the Ratchasuda College devoted solely to disabled persons was established. Athasit Vejjajiva, M.D., father of former Prime Minister of Thailand Abhisit Vejjajiva, had once been the president of Mahidol from 1995 to 1999.