It’s clear that our world is profoundly shaped by machines, from motor cars to mobile phones. But what impact do they have upon our awareness? In the latest Sheldrake-Vernon dialogue, Rupert Sheldrake and Mark Vernon discuss a fascinating new book, In The Shadow of The Machine by Jeremy Naydler. It’s a prehistory of the computer, tracking the way human consciousness evolved in order to conceive of a mechanised world. Sheldrake and Vernon ask what’s been gained and what’s been lost in this process, the ways in which our perception of life and consciousness has been moulded, and how human consciousness might evolve further as the machine metaphor itself "runs out of steam".