Maybe human civilisation is like a single life – we grow out of the royalty of childhood into supreme normality; we find out about our own unspecialness and in a flush of innocence we feel quite glad – if we’re not special then we might not be alone. If there are who-knows-how-many solar systems just like ours, with who-knows-how-many planets, one of those planets is surely inhabited, and companionship is our consolation for being trivial.

