QUOTE : But if it were possible to see everyone who has retired to their beds in a great city at night, in London, New York or Tokyo, for example, if we imagined that the buildings were made of glass and that all the rooms were lit, the sight would be deeply unsettling. Everywhere there would be people lying motionless in their cocoons, in room after room for miles on end, and not just at street level, along roads and crossroads, but even up in the air, separated by plateaus, some of them twenty metres above ground, some fifty, some a hundred. We would be able to see millions of immobile people who have withdrawn from others in order to lie in a coma throughout the night. Sleep’s vertiginous link to primordial times, not just with human life as it first unfolded on the plains of Africa three hundred thousand years ago, but with life on earth in its very first form, rising out of the sea and coming ashore four hundred million years ago, would become apparent. And a bed would no longer be merely a piece of furniture acquired from a shop, but a boat that every human being has and which we board every evening to let ourselves be carried through the night.