From the mythical-sounding City of Ladies and their garden economy to early microcredit banks and rent-a-cow schemes, Kehnel uncovers a world at odds with what we might think of as the typical medieval existence.

Pre-modern history is full of inspiring examples and concepts that open up new horizons. And we urgently need them as today's challenges - finite resources, the twilight of consumerism, growing inequality - threaten what we have come to think of as a modern way of living sustainably.

This is a revelatory look at the past that has the power to change our future.