🇺🇸William
James Sidis

The boy could read the New York Times before he was two years old. His father, Boris Sidis, was a Ukrainian Jewish immigrant, a psychologist who had written groundbreaking papers on crowd psychology and abnormal mental states; his mother, Sarah, had passed her Harvard medical examinations with distinction. William James Sidis was born on April 1, 1898, in Manhattan, and from the earliest months of his life he absorbed knowledge the way most children absorb the texture of the world around them — indiscriminately, insatiably, and with no apparent upper limit.

At eighteen months, he could point to letters on typewriter keys and identify them. At three, he was typing in English. At four, he had written a treatise on anatomy. At five, he had taught himself Latin and Greek. At six, his working languages included English, Latin, French, German, Russian, Hebrew, Turkish, and Armenian — eight distinct linguistic systems that his brain had organized and cross-referenced with the ease that other six-year-olds organized their toy collections. He also invented a language of his own, which he called Vendergood, for which he wrote a full grammar. The language was not a child's game but a systematically constructed artificial tongue, drawing on elements of classical and modern languages with the kind of structural rigor that academic linguists spend careers pursuing.

At the age of nine, he passed the admission examination for MIT. MIT declined to admit him on the grounds that he was too young — not intellectually unqualified, but too young. Harvard was more flexible. In 1909, at the age of eleven, William James Sidis enrolled as a Harvard student. He was photographed for the newspapers. He was interviewed. He was observed by journalists who wrote about him the way they might write about a newly discovered species — with a mixture of wonder and a faint, troubling unease. In January 1910, he delivered a lecture to the Harvard Mathematical Club on four-dimensional bodies. The audience included distinguished professors of mathematics. They reported that the lecture was not merely remarkable for his age. It was remarkable by any measure.

He graduated from Harvard cum laude in 1914 at the age of sixteen. His father had raised him on the theory that intensive early intellectual stimulation — immersion in languages, mathematics, and complex ideas from infancy — could produce a mind of exceptional capability in almost any child. William James Sidis was the proof of concept. He was also the cost of it. Harvard, for him, was not a triumph but an endurance. He had been made a laughingstock by students who found his social awkwardness easy to mock. He had been prodded by journalists and exhibited by his father to an extent that left him, even as a child, visibly uncomfortable. He wanted, with a desperation he would carry for the rest of his life, to be left alone.

He enrolled at Harvard Law School. He withdrew. He joined a socialist political organization and was arrested during a May Day riot in 1919, spending eighteen months under threat of imprisonment before being spirited by his parents to a sanitarium in California and, eventually, released. He spent the rest of his adult life working clerical jobs — adding machine operator, bookkeeper, invoice clerk — under assumed names, in cities where no one knew him. He told interviewers he had renounced mathematics. He said the pressure of his childhood had destroyed any pleasure he might have taken in it. He may have been telling the truth, and he may have been constructing a defensive fiction. It is impossible, now, to know.

He was writing, in private. When he died in 1944 at the age of forty-six from a cerebral hemorrhage, he left behind a remarkable body of unpublished and pseudonymously published work: a detailed study of American indigenous traditions, a manuscript on cosmology that anticipated certain modern ideas about black holes, and a substantial investigation into transportation systems in American cities. He had, it turned out, continued thinking — continued producing original work of genuine intellectual substance — without telling anyone. The greatest child prodigy in American history spent his adult life hiding from the world that had made him famous and never entirely stopped being brilliant.