EntityQ91371· pop 6· linked from 14 articlesErwin AckerknechtSign in to saveTrotskyist (1906-1988)ConnectionsSzczecinEntityTrotskyismEntityTurkeyCountryFranceCountryGermanyCountryParisEntityBerlinEntityAdolf HitlerPersonNew York CityCityWorld War IIConceptViennaEntitymedicineEntityZurichEntityLeon TrotskyEntityLeipzigEntityMarxismEntityCzechoslovakiaEntityNazismEntityFreiburg im BreisgauEntityethnographyEntityCategories1906 births1988 deaths20th-century American historians20th-century American male writers20th-century American science writersAmerican historians of scienceAmerican male non-fiction writersAmerican medical historiansCommanders Crosses of the Order of Merit of the Federal Republic of GermanyCommunist Party of Germany politiciansEmigrants from Nazi Germany to the United States