Belonging to the moderate wing of the PSOE, he was elected vice president of the Cortes Generales in the 1936 Spanish general election. During the Spanish Civil War he occupied diplomatic charges of the Republic in Poland and Czechoslovakia and represented Spain in the League of Nations. Once the Nationalists won the civil war, he was exiled to Argentina in 1939, where he continued his educational career at the National University of La Plata and the National University of the Littoral and the High School of Penal Law and Criminology at the University of Buenos Aires until the Revolución Argentina of 1966. He directed the Magazine of Criminal Law and Criminology until his death. His Tratado de Derecho Penal in seven volumes, has been respected as a masterpieces of the matter. The Brazilian criminal lawyer Nelson Hungria has said that:
If by an atomic catastrophe all the writings on criminal law were lost except the Tratado of Jiménez de Asúa, the future generations would have lost nothing.
Psicoanálisis criminal (1940) Buenos Aires, Losada.
El criminalista (1941-1949, 8 vols)
La Constitución política de la democracia española (1942)
La ley y el delito (1945)
La Constitución de la democracia española y el problema regional (1946)
Tratado de Derecho penal (1949-1963, 7 vols.).
References
^Nelson Hungria cited in the prologue to "Lombroso", by Luis Jiménez de Asúa, Notebooks of the Center of Right and Social Sciences (FUBA), Buenos Aires, Editorial Perrot, 1960.