He studied law at the Universidad Nacional Autónoma de México . He also did postgraduate work at American , French , and British universities . Luis Padilla Nervo represented Mexico during the San Francisco Conference in 1945 and signed the United Nations Charter . In addition , he was the first Mexican Ambassador at the United Nations ; in that position , he was a member of the United Nations Security Council . During the sixth session , he was president of the United Nations General Assembly
San Francisco Conference
United Nations Conference on International Organization
Luis Padilla Nervo