Anna Lowenhaupt Tsing’s book The Mushroom at the End of the World is subtitled “On the possibility of life in capitalist ruins”. She’s not talking about the future, when the industrial economy has completely collapsed. She’s talking about the present, in places where collapse is already well underway. The book describes how alternative economies — not the neat tidy ‘sharing’ economies we idealists like to write about, but the underground economies that emerge out of necessity,...