Redemption Ark

Except that didn’t make any real sense, Felka continued. If intelligence was worth wiping out, for whatever reason, why not do it at source? Intelligence sprang from life; life — except in very rare and exotic niches — sprang from a common brew of chemicals and preconditions. So if intelligence were the enemy, why not intervene earlier in the development cycle?

There were a thousand ways it might have been done, especially if you were working on a timescale of billions of years. You could interfere in the formation processes of planets themselves, delicately perturbing the swirling clouds of accreting matter that gathered around young stars. You could make it happen that no planets formed in the right orbits for water to occur, or that only very heavy or very light worlds were formed. You could fling worlds into interstellar cold or dash them into the roiling faces of their mother stars.

Or you could poison planets, subtly disturbing the stew of elements in their crusts, oceans and atmospheres so that certain kinds of organic carbon chemistry became unfavourable. Or you could ensure that the planets never settled down into the kind of stable middle age that allowed complex multicellular life to arise. You could keep ramming comets into their crusts so that they shuddered and convulsed under an eternity of bombardment, locked in permanent winters.

Or you could tamper with their stars so that the worlds were periodically doused in flame from massive coronal flares, or thrown into terrible deep ice ages.

Even if you were late, even if you had to accept that complex life had arisen and had perhaps even achieved intelligence and technology, there were ways…

Of course there were ways.

A single determined culture could wipe out all life in the Galaxy by the deft manipulation of superdense stellar corpses. Neutron stars could be nudged together until they annihilated each other in sterilising storms of gamma rays. The jets from binary stars could be engineered into directed-energy weapons: flame-throwers reaching a thousand light-years…

And even if that were not feasible, or desirable, life could be wiped out by sheer force. A single machine culture could dominate the entire Galaxy in less than a million years, crushing organic life out of existence.

But that’s not what they are here for, Felka told him.

Why, then? he asked.

There’s a crisis, she told him. A crisis in the deep galactic future, three billion years from now. Except it wasn’t really ‘deep’ at all.