"The species and the genus are always the work of nature [i.e. specially created]; the variety mostly that of circumstance; the class and the order are the work of nature and art."

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The People's democratic dictatorship needs the leadership of the working class. For it is only the working class that is most far-sighted, most selfless and most thoroughly revolutionary. The entire history of revolution proves that without the leadership of the working class revolution fails and that with the leadership of the working class revolution triumphs.

— Mao Zedong