As he would recall in 1983 , Stalin 's purges touched Kuczynski personally in 1942 when he found himself required not merely to deliver to Hermann Duncker the news that Duncker 's son had been executed , but also to convince the father that Soviet justice never made mistakes . Forty years on , Kucynski said he remembered his conversation with Duncker as one that had caused him much heartache because of the way he had had to underline the infallibility of Stalin 's policies " against his own better judgement "
Stalin 's purges
Great Purge
Jürgen Kuczynski