Ervin Szabó (born as Samuel Armin Schlesinger; 23 August 1877 – 29 September 1918)[1] was a Hungarian social scientist, librarian and anarcho-syndicalist revolutionary.
Born Samuel Armin Schlesinger, Szabó's parents were assimilationist Jews from Árva County.
[2] He advanced academically, becoming the vice-president of the Hungarian Association of Social Science (Társadalomtudományi Társaság) in 1906.
[1] After 1905, he began to move away from social democracy towards revolutionary syndicalism, and translated the work of Karl Marx and Friedrich Engels into Hungarian.
He became associates with Georges Sorel, Karl Kautsky, Franz Mehring, Georgi Plekhanov, and later, with Hubert Lagardelle.