The key

The C-stream (or key-stream) was a loop, or a channel. Phrenologists packaged it as the collective unconscious. The dualists couldn’t get past the ghost in the machine. The vast majority struggled to think outside their gorgeous little bubbles at all. But a few enlightened individuals devised a model in the form of a mobius strip. A continuous, linear timeline that, when divided, intersected with itself at historical events.

Some had been using it for prehistoric holidays since time immemorial.