1. Harry Wu and Carolyn Wakeman , Bitter Winds: A Memoir of My Life in China’s Gulags (New York: John Wiley & Sons, 1994), p. 8
2. Ruth Kinna . Kropotkin: Reviewing the Classical Anarchist Tradition (Edinburgh: Edinburgh University Press, 2016)
3. Benjamin Kidd , Social Evolution (London: Macmillan and Co., 1894), p. 65
4. Gregory Claeys , Imperial Sceptics: British Critics of Empire, 1850–1920 (Cambridge: Cambridge University Press, 2010), pp. 235–81
5. Gregory Claeys , Machinery, Money and the Millennium: From Moral Economy to Socialism, 1815–60 (Princeton, NJ: Princeton University Press, 1987)