Medieval illustrations of the mind from the fourteenth century depict memories like snakes feeding into the imagination and, long before this, both Aristotle and Galen described memories not as archives of our lives, but as tools for the imagination.
I see the last two millennia as laid out in columns, like a reverse ledger sheet. It's as if I'm standing at the top of the twenty-first century looking downwards to 2000. Future centuries float as a gauzy sheet stretching over to the left. I also se...
