C.A.E. Goodhart in his paper, ‘The Two Concepts of Money, and the Future of Europe’. Those stories are, the ‘Metallists Theory of Money’ and the ‘Chartalists Theory of Money’.

https://www.elibrary.imf.org/downloadpdf/display/book/9781557756527/ch010.pdf

Our journey towards enlightenment – as far as understanding where money came from – will be via the two main stories about its origins outlined by C.A.E. Goodhart in his paper, 'The Two Concepts of Money, and the Future of Europe'. Those stories are, the 'Metallists Theory of Money' and the 'Chartalists Theory of Money'.