Pelagio B. Luna was an Argentine

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

 politician of the Radical Civic Union

Radical Civic Union

The Radical Civic Union is a political party in Argentina. The party's positions on issues range from liberal to social democratic. The UCR is a member of the Socialist International. Founded in 1891 by radical liberals, it is the oldest political party active in Argentina...

. He reached the post of Vice President

Vice president

A vice president is an officer in government or business who is below a president in rank. The name comes from the Latin vice meaning 'in place of'. In some countries, the vice president is called the deputy president...

 in 1916.

Born in La Rioja, Argentina

La Rioja, Argentina

La Rioja is the capital city of the Argentine province of La Rioja, located on the east of the province. The city has a population of almost 150,000 as per the ....

, where his father was founder of the Radical Civic Union, Luna graduated from the University of Buenos Aires

University of Buenos Aires

The University of Buenos Aires is the largest university in Argentina and the largest university by enrollment in Latin America. Founded on August 12, 1821 in the city of Buenos Aires, it consists of 13 faculties, 6 hospitals, 10 museums and is linked to 4 high schools: Colegio Nacional de Buenos...

 at the age of 22. He returned to La Rioja and worked as a lawyer then entered the judicial system, serving as a judge. He also taught literature at the National School of La Rioja.

Luna joined the Radical Youth in 1889 and took part in the armed revolution the following year. He was part of the National Convention of November 1892. He was a candidate for National Deputy

Argentine Chamber of Deputies

The Chamber of Deputies is the lower house of the Argentine National Congress. This Chamber holds exclusive rights to create taxes, to draft troops, and to accuse the President, the ministers and the members of the Supreme Court before the Senate....

 in 1912 and for governor of La Rioja in 1913, without success.

In 1916 Luna was elected vice president on Hipólito Yrigoyen

Hipólito Yrigoyen

Juan Hipólito del Sagrado Corazón de Jesús Irigoyen Alem was twice President of Argentina . His activism became the prime impetus behind the obtainment of universal suffrage in Argentina in 1912...

's ticket, as the first elected vice president under the Sáenz Peña Law

Sáenz Peña Law

The Sáenz Peña Law was Law 8871 of Argentina, sanctioned by the National Congress on 10 February 1912, which established the universal, secret and mandatory male suffrage though the creation of an electoral list...

, serving until his death in 1919. As President of the Senate

Argentine Senate

The Argentine Senate is the upper house of the Argentine National Congress. It has 72 senators: three for each province and three for the Autonomous City of Buenos Aires...

, he helped create the National Library of Argentina, serving as its first president.