It is remarkable that Lord Esher should be so much astray...We must conclude that an uncontrollable fondness for fiction forbade him to forsake it for fact. Such constancy is a defect in an historian.
Why couldn't the world that concerns us- be a fiction? And if somebody asked, 'but to be a fiction there surely belongs an author?'- couldn't one answer simply: 'Why? Doesn't this "belongs" perhaps belong to the fiction, too?'
Science fiction is never about the future, in the same way history is rarely about the past: they're both parable formats for examining or commenting on the present.