John Gray at The New Statesman:
In 1968 a Red Guard publication instructed that scientists must follow Mao Zedong’s injunction: “Be resolute, fear no sacrifice and surmount every difficulty to win victory.” Expert knowledge was not valid, and might be dangerously misleading, without the great leader’s guidance. Examples of revolutionary science abounded at the time. In one account, a soldier training to be a veterinarian found it difficult to castrate pigs. Studying Mao’s words enabled him to overcome this selfish reaction and gave him courage to perform the task. In another inspirational tale, Mao’s thoughts inspired a new method of protecting their crops from bad weather: making rockets and shooting them into the sky, peasants were able to disperse the clouds and prevent hailstorms.
By the time the Red Guard publication appeared, Mao’s Little Red Book had been published in numbers sufficient to supply a copy to every Chinese citizen in a population of more than 740 million. At the peak of its popularity from the mid-1960s to the mid-1970s, it was the most printed book in the world. In the years between 1966 and 1971, well over a billion copies of the official version were published and translations were issued in three dozen languages. There were many local reprints, illicit editions and unauthorised translations.