= Nicholas Metropolis
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<Nicholas Metropolis> helped develop electronic-computer implementations of the <Monte Carlo method> at Los Alamos. Instead of tracking every possible sequence of events analytically, the method samples individual random histories and estimates quantities from their collective outcomes.
His firsthand 1987 account describes simulations of <neutron> transport: sampled flight distances and interactions generate a history, and repeating histories estimates transport behaviour. The scientific contribution connects <probability> to a computational experiment, making problems accessible even when their many possible paths are difficult to enumerate.<The Beginning of the Monte Carlo Method by Nicholas Metropolis>[The Spark and The Method, pp. 126–127]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:FilePath/Metropolis-nicholas.jpg]
{title=<Nicholas Metropolis> in his Los Alamos identification photograph}
{description=Los Alamos National Laboratory badge photograph; https://commons.wikimedia.org/wiki/File:Metropolis-nicholas.jpg[Wikimedia Commons provenance record].}
{height=300}
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