Writing the Hard Part

Hard sci-fi has a reputation for being unfriendly. Cold prose. Math on the page. Engineers who never quite feel like people. The genre, the dismissal goes, is more interested in the orbital mechanics than in anyone aboard.

I don’t think that’s what hard sci-fi is. I think it’s what hard sci-fi is when it’s done badly. What hard sci-fi actually demands — when it’s done well — is the opposite of unfriendliness. It is unusual respect for the reader.

The three demands

When I sit down to write hard sci-fi, I’m holding myself to three rules. Break any of them and the genre stops being what it’s for.

One: the physics has to be load-bearing. Not decorative. Not a glaze applied to the surface to look impressive. The physics has to do something — generate the conflict, force the decision, close the option the protagonist wanted to take. A spaceship that uses a real magnetoplasma drive is just a spaceship until the drive limits the burn window and the burn window is what the protagonist is fighting against. Then the physics is doing the work.

Two: the characters have to know more than the reader. This is the hard one. The temptation, in any genre, is to make the protagonist a stand-in for the reader — to have them ask the questions the reader would ask. In hard sci-fi this kills the book. The crew of a generation ship doesn’t marvel at the cold-sleep chambers; they use them. The reader has to figure out what’s going on by watching expert competence in motion. The book trusts the reader to catch up.

Three: the wonder has to come from the work, not the spectacle. The big shot of the planet from orbit is fine. The bigger moment, the one the reader remembers, is the engineer at 03:00 ship-time running a checklist she has run nine hundred times, and catching the one variable nobody else noticed. The wonder is competence rendered visible. Hard sci-fi’s most romantic image is somebody doing their job at a higher level than they had to.

What the reader gets

What the genre gives back to the reader who shows up for this contract is, in my experience, the deepest immersion any genre offers. The world feels real — not because the writer described it lushly but because the writer treated it like a real place with real constraints. The characters feel real — not because they were emotionally elaborated but because they were competent on the page, and competence is the most attractive quality in fiction.

That’s the offer. I will not condescend to you. I will not over-explain. I will respect what you came for. In return: the future doesn’t flinch, and neither do the people who arrive in it.