If anybody is interested by (or feels like contesting) this view of how earlier economies functioned without money and/or how money came to be, I highly recomme

If anybody is interested by (or feels like contesting) this view of how earlier economies functioned without money and/or how money came to be, I highly recommend Debt by David Graeber (a self-declared radical activist, instigator of the Occupy Wall Street movement, and brilliant anthropologist — I had the good fortune of attending some of his letters, and he is enthralling).