Erik Grigorevich Yudin (1930 – 15 January 1976) was a Russian philosopher and cybernetician.
In 1956, Yudin, publicly denounced the Russian invasion of Hungary.
His employment was termination, he was expelled from the Communist Party, and then arrested by the KGB and imprisoned.
[1] He then started to attended seminars of the Moscow Methodological Group run by Georgy Shchedrovitsky.
He was the first person to differentiate between activity as a “perspective” – which he calls an explanatory principle – and as an object of study.