- The gold and silver trees in C.S. Lewis’s The Magician’s Nephew (1955).
- Clifford D. Simak, ‘The Money Tree’ (1958).
- Leaf currency on primordial Earth in Douglas Adams’s The Restaurant at the End of the Universe (1980).
- The money tree in Nalo Hopkinson’s ‘Money Tree’ (1997).
- Leaf currency on the planet Rain in Adam Roberts’s Stone (2002).
You can read more about leafy and other organic currencies at Economic Science Fiction and Fantasy.
The not-for-profit organisation Positive Money have used the recent chatter about magic money trees as a teachable moment. Money does grow on branches: bank branches. More here.
Goldsmiths has launched the interdisciplinary Political Economy Research Centre. In the first public lecture for PERC, Professor Ha-Joon Chang asks, “What Can Economics Learn From Science Fiction?” Topics Chang touches on include neoclassical economics as science fiction, the political construction of markets, alternate history and the US Civil War, Orwell and dystopian technological progress, Vonnegut and post-scarcity, child labour, cultural and historical materialism, and the invention of industrial time. In fact, Chang suggests how both fields can learn from each other. The lecture is available as a podcast.