A human being becomes human not through the casual convergence of certain biological conditions, but through an act of will and love on the part of other people. If this is not the case, then humanity becomes — as it is already to a large extent — no more than a rabbit-warren. But this is no longer a “free-range” warren but a “battery” one, in the conditions of artificiality in which it lives, with artificial light and chemical feed.

Author: Italo Calvino