Is it not highly disgraceful and dangerous to make increasingly frequent attempts, either directly or indirectly (through silence), to publicly rehabilitate Stalin, his associates, and his policy, his pseudosocialism of terroristic bu­reaucracy, a socialism of hypocrisy and ostentatious growth that was at best a quantitative and one-sided growth involving the loss of many qualitative features?

Progress, Coexistence and Intellectual Freedom (1968) - Dangers - The Threat to Intellectual Freedom