He became famous as a sociographic and fictive short-story writer (in his early times, he identificated himself as radical leftist, e.g. he sympathized with illegal communist movement).
He was considered to be a populist author seeking reform in imaginative and sociographic writings, socialistic but highly independent.
He joined to the group of the anti-Nazi resistant Endre Bajcsy-Zsilinszky (a representative in the Parliament of the Independent Smallholders' Party) and a group of writers, the "Folk Writers" (népi írók), along with László Németh, Gyula Illyés, Géza Féja, Zsigmond Móricz and others.
By writing a memorandum to Miklós Horthy jr.'s Secession Office, he got involved into anti-Nazi activities and that's why he had to escape from Balatonakarattya to Budapest in 1944.
Some of the folk writers (like József Erdélyi) really collaborated with Nazis more or less, but men (like Kodolányi or Lőrinc Szabó) were mired too despite they weren't related at all with them.