LISP at 67: How a 1958 Math Theory Shaped Every Modern Programming Language

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LISP, conceived by John McCarthy at MIT in 1958 and formally published in April 1960, was originally designed as a mathematical theory rather than a practical programming language. A graduate student named Steve Russell independently implemented its interpreter within days, bringing the language to life unexpectedly. Core concepts introduced by LISP — including conditionals, recursion, first-class functions, closures, and the Read-Eval-Print Loop — are now standard features in languages like Python, JavaScript, Rust, and Java. The language also pioneered 'code as data' through S-expressions, a principle that influenced macro systems in Elixir, Julia, Clojure, and Rust. Despite never dominating mainstream adoption due to its unfamiliar syntax and ties to declining AI research funding, LISP's foundational ideas remain embedded in virtually every programming language used today.

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