The word “autism” comes from the Greek word autos, meaning “self.” Swiss psychiatrist Paul Bleuler coined the term in 1911 by combining this Greek root with the suffix -ismos, which indicates a state or condition. The literal sense is something like “a state of self,” and Bleuler used it to describe patients who seemed profoundly withdrawn into their own inner world. The condition he was describing, though, was not what we call autism today.
Bleuler’s Original Meaning
Bleuler introduced the word “autism” not as a standalone diagnosis but as a feature of schizophrenia. He was trying to capture what he saw as the core experience of schizophrenic patients: a detachment from reality combined with a rich inner fantasy life. In his own words, he described patients who “have encased themselves with their desires and wishes” and “have cut themselves off as much as possible from any contact with the external world.” He called this withdrawal “autism.”
For decades, the term stayed anchored to schizophrenia. It described a symptom, not a separate condition. This would cause real confusion later, because children who showed severe social and developmental differences were often lumped under childhood schizophrenia, with no distinct label of their own.
Kanner and Asperger Reshape the Term
In 1943, American psychiatrist Leo Kanner published a landmark paper describing 11 children who shared a striking pattern: they seemed unable to form typical social connections from the very beginning of life. Kanner called the condition “infantile autism,” borrowing Bleuler’s term but applying it to something fundamentally different. He concluded that these children had “come into the world with an innate inability to form the usual, biologically provided contact with people.” This was a neurodevelopmental condition present from birth, not a withdrawal into fantasy triggered later in life.
One year later, in 1944, Viennese pediatrician Hans Asperger independently described a group of boys with what he called “autistic psychopathy.” His patients shared some traits with Kanner’s, particularly in social differences, but often had strong verbal abilities. Asperger’s work, published in German during wartime, remained largely unknown to English-speaking researchers for decades.
Both clinicians used Bleuler’s root word “autism” to highlight what they saw as the central feature: a child turned inward, relating to the world in an unusual way. But their descriptions marked the real beginning of autism as its own diagnostic concept, separate from schizophrenia.
From Schizophrenia Label to Distinct Diagnosis
Despite Kanner’s 1943 paper, official psychiatric manuals were slow to catch up. In 1968, the second edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-II) still offered only “childhood schizophrenic reaction” as a category for children with the kinds of differences Kanner had described. There was no separate autism diagnosis.
Through the 1970s, several lines of research converged to show that autism was genuinely distinct from schizophrenia. The two conditions had different patterns of onset, different family histories, and different developmental trajectories. This evidence finally led to autism being listed for the first time as its own official diagnosis in the DSM-III in 1980, under the name “infantile autism.” It was placed in a brand-new category called Pervasive Developmental Disorders, a clear signal that clinicians now understood it as a developmental condition rather than a psychotic one.
How “Autism” Became a Spectrum
In the 1980s, British psychiatrist Lorna Wing introduced the concept of an autism spectrum. Rather than treating autism as a single, narrowly defined condition, Wing argued that autistic traits existed along a continuum, ranging from people with significant support needs to those with subtler social differences. She also helped bring Hans Asperger’s earlier work to wider attention, which eventually led to “Asperger’s disorder” becoming its own diagnostic category.
By the time the DSM-5 was published in 2013, the manual consolidated everything under one umbrella term: Autism Spectrum Disorder. The previous separate categories, including autistic disorder, Asperger’s disorder, childhood disintegrative disorder, and PDD-NOS (a catch-all for cases that didn’t fit neatly elsewhere), were all folded into this single diagnosis. The core criteria were also restructured into two domains: social communication difficulties and restricted or repetitive behaviors or interests. Language ability, previously part of the core criteria, became a separate note a clinician could add rather than a defining feature.
A 2022 update to the manual (DSM-5-TR) further clarified the wording of the social communication criterion to eliminate ambiguity about how many types of social differences needed to be present for a diagnosis.
The Word’s Cultural Shift
For most of the 20th century, “autism” carried Bleuler’s original connotation of pathological self-absorption. That framing began to change in the 1990s. In 1998, Australian sociologist Judy Singer coined the term “neurodiversity” in her university thesis, arguing that autism and similar neurological differences are natural variations in the human brain rather than defects to be cured. Singer wrote that “the key significance of the Autism Spectrum lies in its call for and anticipation of a politics of neurological diversity.”
This shift reframed the word’s emotional weight. “Autism” still traces back to the Greek autos, “self,” but for many people today it no longer implies a person trapped inside themselves. Instead, it describes a different way of processing the world, one that carries real challenges but also a distinct perspective. The word has traveled a long way from Bleuler’s 1911 description of schizophrenic withdrawal, even as its Greek root remains unchanged.