The Kaczynski’s grew up near Chicago, Illinois, and both of them were known to have been highly intelligent from an early age. They came from a working-class family, and their parents tried to instill those values in them. According to The Guardian, their father used to take them out to the woods on weekends so they could explore — something that helped cultivate a love for nature in the Kaczynskis.
The two of them were close when they were kids, but David Kaczynski later recalled that he noticed something unusual about Ted, even at an early age. Despite his unquestioned intelligence, he seemed to have an aversion to people. Their mother attributed this to a stint in the hospital Ted had when he was just an infant.
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Nonetheless, Ted — the older of the two — used his smarts to skip 11th grade and enter Harvard University when he was just 16 years old, according to All That’s Interesting. David followed suit, and, like his older brother, ended up at an Ivy League school — in his case, Columbia University, where he studied to become a social worker. Ted studied mathematics at Harvard, and by the time he was 24 years old, he had moved across the country to teach at the University of California, Berkeley, where he became one of the youngest professors in the school’s history. However he wasn’t there all that long and returned to Chicago just two years later to move in with his family.
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