From 1936 to 1939 more than 1.2 million Party members, half of the total membership, were arrested. Only fifty thousand regained freedom; the others … - Andrei Sakharov

A very large nuclear war would be a calamity of indescribable proportions and absolutely unpredictable consequences, with the uncertainties tending towards the worse...All-out nuclear war would mean the destruction of contemporary civilization, throw man back centuries, cause the deaths of hundreds of millions or billions of people, and, with a certain degree of probability, would cause man to be destroyed as a biological species.

Actually the crimes of the Maoists against human rights have gone much too far, and the Chinese people are now in much greater need of help from the world's democratic forces to defend their rights than in need of the unity of the world's Communist forces, in the Maoist sense, for the purpose of combating the so-called imperialist peril somewhere in Africa or in Latin America or in the Middle East.

Intellectual freedom is essential to human society — freedom to obtain and distribute information, freedom for open-minded and unfearing debate, and freedom from pressure by officialdom and prejudices. Such a trinity of freedom of thought is the only guarantee against an infection of people by mass myths, which, in the hands of treacherous hypocrites and demagogues, can be transformed into bloody dictatorship. Freedom of thought is the only guarantee of the feasibility of a scientific democratic approach to politics, economy, and culture. But freedom of thought is under a triple threat in modern society—from the deliberate opium of mass culture, from cowardly, egotistic, and philistine ideologies, and from the ossified dogmatism of a bureaucratic oligarchy and its favorite weapon, ideological censorship. Therefore, freedom of thought requires the defense of all thinking and honest people.