Kropotkin wrote: "After the Collectivist Revolution instead of saying 'twopence' worth of soap, we shall say 'five minutes' worth of soap." (quoted in Brauer, Fae (2009). 〈Wild Beasts and Tame Primates: 'Le Douanier' Rosseau's Dream of Darwin's Evolution〉. Larsen, Barbara Jean. 《The Art of Evolution: Darwin, Darwinisms, and Visual Culture》. UPNE. 211쪽. ISBN9781584657750.)