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| Nationalization of the Mexican oil industry (1938) | |
|---|---|
| Name | Nationalization of the Mexican oil industry (1938) |
| Native name | Expropiación petrolera de 1938 |
| Date | 18 March 1938 |
| Place | Mexico City, Mexico |
| Key figures | Lázaro Cárdenas del Río, Luis N. Morones, Álvaro Obregón, Plutarco Elías Calles, President of Mexico, John D. Rockefeller Jr., William D. Leahy |
| Outcome | Creation of Petróleos Mexicanos; transfer of foreign assets to Mexican state |
Nationalization of the Mexican oil industry (1938) was the expropriation and transfer of foreign-owned oil assets to the Mexican state on 18 March 1938. The action, led by President of Mexico Lázaro Cárdenas del Río, dissolved contracts held by British, United States, Dutch and other companies and created Petróleos Mexicanos (Pemex); it reshaped Mexico's relations with United Kingdom, United States, the League of Nations, and global petroleum markets. The decision was grounded in constitutional labor disputes, national sovereignty debates, and the politics of the Great Depression and interwar international order.
Labor conflict and legal contestation began after the promulgation of the Constitution of Mexico (1917), which included provisions on subsoil resources and labor rights. Disputes between Mexican oil workers represented by the Confederation of Mexican Workers (CTM) and multinational corporations such as the Anglo-Persian Oil Company, Royal Dutch Shell, Standard Oil, and El Aguila intensified in the 1920s and 1930s alongside campaigns by figures like Lázaro Cárdenas del Río and allies including Álvaro Obregón-era politicians. The 1936 strike led by union leaders tied to the Partido Nacional Revolucionario (later Institutional Revolutionary Party) tested interpretations of Article 27 of the Constitution of Mexico (1917) concerning subsoil ownership. International factors—commodity price shocks from the Great Depression, strategic concerns related to Spanish Civil War, and pressure from United States oil interests including families like the Rockefeller family—provided a volatile backdrop.
Cárdenas used constitutional prerogatives and executive decrees to enact expropriation following rulings by the Supreme Court of Justice of the Nation and labor tribunals that affirmed workers' claims. The Mexican Congress and federal ministries including the Secretariat of National Economy and the Secretariat of Labor and Social Welfare were engaged in drafting the decree that invoked Article 27. Legal advisers drew on precedents from Latin American resource nationalism and cited doctrines debated in forums such as the Hague Conference and the Permanent Court of International Justice. Diplomatic channels with embassies of the United Kingdom, United States, Netherlands, and France were utilized even as Cárdenas announced creation of a national oil company, later named Petróleos Mexicanos.
Domestically, the expropriation solidified Cárdenas' standing among labor unions such as the Confederation of Mexican Workers and rural organizations like the National Rural Confederation, while alienating business groups including the Chamber of Commerce of Mexico City. The decree prompted celebrations in public plazas like the Zócalo (Mexico City), rallies involving cultural figures from networks including the Mexican Communist Party, and endorsements from intellectuals associated with the Ateneo de la Juventud and artists linked to the Mexican muralism movement such as Diego Rivera and David Alfaro Siqueiros. Legal challenges were mounted by foreign corporations through their national governments and commercial arbitration institutions including the International Court of Justice-linked bodies argued in diplomatic correspondence.
The United Kingdom and United States reacted with diplomatic protests, economic measures, and delay in formal recognition of the expropriation; the British Embassy, Mexico City and the United States Embassy, Mexico City coordinated policy with London and Washington, D.C. respectively. International oil companies appealed to their home governments—Royal Dutch Shell, Standard Oil of New Jersey, Standard Oil of California, Anglo-Persian Oil Company, and Dutch firms pursued compensation claims. The expropriation complicated relations with the League of Nations and influenced debates at the Pan-American Union and the Montevideo Conference on non-intervention. Some states, including Soviet Union, extended political support, while nations with large commercial stakes negotiated bilateral settlements; prolonged disputes shaped Mexico's foreign policy, including interactions with diplomats such as Henry L. Stimson and naval officers like William D. Leahy.
Creation of Petróleos Mexicanos consolidated exploration, refining, and distribution assets formerly controlled by multinational corporations and spurred investments in refineries, pipelines, and ports such as Tuxpan, Veracruz and Coatzacoalcos. Short-term export disruptions affected petroleum flows to markets in the United States and Europe, altered trade balances, and required Mexico to negotiate credit and technology transfers with firms from Germany, Italy, and later the United States under changing diplomatic conditions. National control over oil revenues funded public works tied to initiatives by the Secretariat of Public Education and infrastructure projects influenced by planners from networks related to Luis Barragán-era modernizers. The expropriation became a model for resource nationalism adopted by other states during the mid-20th century, informing policies in Venezuela, Iran, and Iraq.
The 1938 expropriation became central to Mexican national identity, commemorated as a symbol of sovereignty in civic rituals alongside anniversaries of the Mexican Revolution and figures such as Benito Juárez. Pemex emerged as an emblem of economic independence and a major state-owned enterprise that shaped Mexico's developmental strategies, industrial policy debates in forums like the Organization of American States, and energy politics through the 20th century. The episode influenced later reforms under presidents including Miguel Alemán Valdés, Luis Echeverría, and the structural shifts preceding the Petróleos Mexicanos reforms of the late 20th and early 21st centuries, affecting contemporary debates over the Energy Reform (Mexico).
Historiography has been shaped by scholars from institutions such as the National Autonomous University of Mexico, El Colegio de México, and international universities who analyze archives of the Secretariat of Foreign Affairs and corporate records from Royal Dutch Shell and Standard Oil. Commemorative practices include monuments in Mexico City, state ceremonies presided by presidents and ministers, and cultural productions—films, murals, and literature—by creators linked to movements like Mexican muralism and intellectual circles such as the Generation of 1915. Academic debates continue over legal interpretations of Article 27, economic outcomes, and Mexico's role in 20th-century resource nationalism, with perspectives articulated in works by historians and legal scholars from institutions including the Instituto Nacional de Antropología e Historia and the Center for Latin American Studies.
Category:Petróleos Mexicanos Category:History of Mexico (1920–1946)