In 1906 he served as secretary general of the Convention that proclaimed the presidential candidacy of Pedro Montt and directed his electoral campaign.

Re-elected deputy for San Felipe, Los Andes and Putaendo, period 1912–1915; He was a member of the Permanent Commission on Social Legislation; and that of Public Instruction.

[1] He was re-elected to represent 11th Departmental Constituency, Curicó, Santa Cruz and Vichuquén, period 1926–1930; He was a member of the Permanent Commission for Constitutional Reform and Regulations.

In Geneva he interacted with the Peruvian Delegation and those conversations served as a precursor to Chile's diplomatic offensive in 1921, to seek a solution to the conflict.

The Council of the League of Nations appointed him a member of the Joint Armaments Commission and, within it, he chaired the first subcommittee in charge of studying the manufacture and trade of arms.

He was the first manager of the reforms demanded by Alessandri and granted by Congress in January 1924, which is why his signature appears on the commitment document, even though he did not have any position at that time.

[1] He also dedicated himself to journalism; His first works were published in La Nación in October 1917, under the pseudonym Segundo Jara; and in February and March 1918, with the name of Primitivo Rojas.

[1] During the presidency of Carlos Ibáñez del Campo he was ordered to leave the country, due to his articles published in El Mercurio, which were censored.

On February 25, 1927, he left Santiago for Valparaíso, where he embarked the same day bound for Guayaquil; but in Arica he was detained and there he was reunited with his wife and his eldest daughter.

In March he went to New York City, where he was offered the position of deputy arbitrator in the claims courts of Germany, Spain and Italy, against Mexico, presided over by Miguel Cruchaga Tocornal, Chile's ambassador in Washington, D.C.; The interested governments accepted the proposal, and thus, he settled momentarily in Washington, D.C., where he met with his entire family.

In October of the same year he went to Paris, where he accepted the position of president of the Mixed Commission for the Exchange of Populations between Greece and Turkey, offered to him by the Council of the League of Nations.

During this period he made four trips to Mexico and ended his work on the Mexican-German and Spanish-Mexican Commission; and in the critical period of relations between Turkey and Greece, he intervened as a mediator between both countries and after repeated trips to Athens and Ankara, he managed to establish the bases of the agreement, which was sealed with the signing of the Treaty of Ankara, in June 1930, among other treaties of peace and friendship.

He was also awarded decorations by the governments of China (Order of the Precious Brilliant Golden Grain) Cuba, Venezuela and Peru.