George Packer

The constellation of opinion called the blogosphere consists, like the stars themselves, partly of gases. This is what makes blogs addictive - that is, both pleasurable and destructive: They're so easy to consume and so endlessly available.

A few drugs - such as beta-blockers, statins and glycogen control medications - have proved very effective at managing hypertension, heart disease, diabetes and strokes. Most insurance plans charge something for them. Why not make drugs like these free? Not for everyone, but just the groups for whom they are provably effective.

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.