The National Revolutionary Party (PNR) was a socialist political party in Mexico that existed from 4 March 1929 to 30 March 1938. The party was founded at the initiative of Plutarco Elias Calles following the death of Alvaro Obregon and the demise of the Laborist Party, and it was founded with the goal of transitioning Mexico from caudillo governments to a regime of institutions. The PNR emerged as a coalition of the regional parties and various states of the republic and became a centralized organization when the entities that had formed it were dissolved. In its first stage, it supported nationalism and populism, subordinating workers and peasants in favor of capitalism. However, from 1933, the party adopted a position closer to socialism and supported state interventionism in the economy, education, and industry. In its second-stage, the semi-corporatization of the masses was also carried out, with the creation of confederations and other organizations of workers, peasants, and public employees.
From 1928 to 1935, Calles ruled the country during the Maximato period, which was brought to an end as the result of a confrontation between Calles and President Lazaro Cardenas. Calles left the country in exile and his followers were eliminated from the presidential cabinet and the party itself, and Cardenas' growing support for workers and peasants increased the discontent with the party structure. Ultimately, Cardenas transformed the party to incorporate the workers and peasants themselves, as well as public and military employees. The PNR was dissolved in 1938, and it was succeeded by the Party of the Mexican Revolution.