21/08/2026
💜 very interesting article
First person diagnosed with Autism and he was part of Leo Kanner’s study
The first person ever formally identified with autism lived long enough to see the condition go from virtually unknown to recognized around the world.
His name was Donald Grey Triplett.
And he lived until 2023.
Donald was born in 1933 in the small town of Forest, Mississippi.
From an early age, his parents knew there was something unusual about him.
He had an extraordinary memory.
He could remember seemingly random information with remarkable precision.
He became fascinated with numbers and patterns.
He could reproduce melodies after hearing them only once.
But Donald also seemed largely uninterested in interacting with other people.
He disliked disruptions to his routines and could become deeply absorbed in his own activities.
His parents, Mary and Beamon Triplett, wanted to understand what was happening.
In 1938, they took Donald to Baltimore to meet child psychiatrist Leo Kanner at Johns Hopkins.
Donald was five years old.
Kanner had never encountered a child quite like him.
Over the following years, Kanner began studying Donald and several other children who displayed a similar collection of characteristics.
Then, in 1943, Kanner published one of the foundational papers in the history of autism research:
“Autistic Disturbances of Affective Contact.”
It described 11 children.
Donald was the first case.
He was identified simply as:
“Case 1, Donald T.”
Because of that paper, Donald Triplett became widely recognized as the first person diagnosed with what Kanner called “infantile autism.”
At the time, autism wasn't understood as it is today.
Kanner was attempting to describe a distinct condition that the medical community was only beginning to recognize.
Donald therefore spent his childhood at the very beginning of modern autism research.
And his life took a path that many people at the time might never have predicted.
His parents fought to ensure that he received an education and remained connected to their community.
Donald eventually attended high school.
Then college.
In 1958, he graduated from Millsaps College with a bachelor's degree in French.
He learned to drive.
He worked.
For roughly 65 years, Donald held a job at a local bank in Forest, where his mathematical abilities were particularly useful.
He also became an enthusiastic golfer.
And he traveled extensively.
Donald reportedly visited dozens of countries and traveled independently to places across Europe, Africa and the United States.
Perhaps most importantly, his hometown largely accepted him.
People in Forest knew Donald's routines and peculiarities.
They looked out for him without preventing him from living independently.
Journalists John Donvan and Caren Zucker later explored Donald's extraordinary life while researching the history of autism.
When they tracked down “Case 1,” they discovered that the little boy described in a landmark 1943 psychiatric paper was still living in the same Mississippi community decades later.
Donald ultimately lived to 89.
He died in June 2023 after an extended illness.
His lifespan encompassed essentially the entire modern history of autism.
When Donald was a child, there wasn't even an established clinical diagnosis describing people like him.
By the time he died, autism was recognized around the world, millions of people had received diagnoses, enormous research programs existed to study it, and autistic adults had built advocacy movements demanding greater acceptance and autonomy.
There is an important historical qualification:
Donald wasn't literally the first autistic human being.
Autistic people obviously existed long before doctors developed the modern diagnostic category, and other physicians described autism-like cases before Kanner's landmark paper.
Donald is famous because he was “Case 1” in Kanner's foundational description of infantile autism and is widely regarded as the first person diagnosed under that clinical framework.
In 1943, medical literature knew him simply as:
Donald T.
Case 1.
Eighty years later, Donald Triplett was still here.
He lived long enough to watch a diagnosis that effectively began with him become understood by the entire world.
