Hipólito Yrigoyen, Argentinian lawyer and politician, 19th President of Argentina (d. 1933)
Juan Hipólito del Sagrado Corazón de Jesús Yrigoyen (Spanish pronunciation: [i'polito iri'ɣoʝen]; 12 July 1852 – 3 July 1933) was an Argentine politician of the Radical Civic Union and two-time President of Argentina, who served his first term from 1916 to 1922 and his second term from 1928 to 1930. He was the first president elected democratically by means of the secret and mandatory male suffrage established by the Sáenz Peña Law of 1912. His activism was the prime impetus behind the passage of that law in Argentina.

Known as "the father of the poor", Yrigoyen presided over a rise in the standard of living of Argentina's working class together with the passage of a number of progressive social reforms, including improvements in factory conditions, regulation of working hours, compulsory pensions, and the introduction of a universally accessible public education system.

Yrigoyen was the first nationalist president, convinced that the country had to manage its own currency and, above all, it should have control of its transportation and its energy and oil exploitation networks.Between the 1916 general election and the September Revolution, political polarization was on the rise. Personalist radicalism was presented as the "authentic expression of the nation and the people" against the "oligarchic and conservative regime". For the ruling party, the will of the majorities prevailed over the division of powers. The opposition, on the other hand, accused the Executive Branch of being arrogant and demanded greater participation from Congress, especially in matters such as the conflictive federal interventions.