Noam Chomsky

When General Allenby conquered Jerusalem during World War I, he was hailed in the American press as Richard the Lion-Hearted, who had at last won the Crusades and driven the pagans out of the Holy Land.

One of the best predictors of policy around is Thomas Ferguson's investment theory of politics, as he calls it - very outstanding political economist - which essentially - I mean, to say it in a sentence, he describes elections as occasions in which groups of investors coalesce and invest to control the state.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.