Autism was not “discovered” by a single person; several clinicians described it over time, but the key early figures were Grunya Sukhareva, Leo Kanner, and Hans Asperger. Most modern histories credit Kanner with defining autism as a distinct diagnosis in 1943, while newer scholarship highlights Sukhareva’s earlier work in the 1920s.

Early descriptions of autism

  • In 1925, Ukrainian psychiatrist Grunya Sukhareva published detailed case descriptions of children with social difficulties, unusual interests, and sensory traits that closely resemble what is now called autism.
  • Her work, written in Russian and German, was largely overlooked for decades, and only in the 21st century have historians emphasized how accurate and ahead of its time her descriptions were.

Leo Kanner’s 1943 paper

  • In 1943, American child psychiatrist Leo Kanner published a landmark paper describing 11 children with “early infantile autism,” clearly framing autism as a distinct clinical condition.
  • Kanner highlighted social withdrawal, insistence on sameness, and language differences, and for many years was widely credited in English‑language literature as the person who “discovered” autism.

Hans Asperger’s contribution

  • In 1944, Austrian pediatrician Hans Asperger described boys with good language and intelligence but marked social and communication differences, later called “Asperger’s syndrome.”
  • His work helped shape ideas about “milder” or “high‑functioning” presentations, though his legacy is now debated due to evidence of his links to Nazi‑era policies.

Earlier and broader history

  • Some authors point to earlier clinical cases, like French physician Jean Itard’s 1799 account of “Victor, the Wild Boy of Aveyron,” who showed social and communication differences, though this is not considered a formal discovery of autism.
  • Modern reviews stress that autism is a neurodevelopmental variation that has always existed; what changed over the 20th century was naming, classification, and the growth of autistic self‑advocacy and research.

So, who “discovered” autism?

  • If the question is about formal diagnostic definition, most textbooks still name Leo Kanner as the main figure, due to his 1943 description of early infantile autism.
  • If the question is about the first clear clinical descriptions, many contemporary historians argue that Grunya Sukhareva deserves recognition as the earliest known clinician to describe autism‑like profiles in detail in the 1920s.

Information gathered from public forums or data available on the internet and portrayed here.