Book recommendation: A Half-Built Garden, by Ruthanna Emrys

This sci-fi book starts out as a first contact novel. Aliens show up and say "Your planet is dying--we're here to rescue you! Come join our galactic federation!"

Here's the twist: the protagonist emphatically refuses. The world is sick, but humanity is healing it. Successfully. They have been for decades. And they refuse to leave Earth and go explore the stars until the job is done.

Thus begins this story's major conflict. The aliens have visited a few other planets with signs of advanced civilization, and in every case they've arrived too late--the other civilizations have extincted themselves by the time they arrive. The aliens are emphatic that technological societies cannot thrive on a planet's surface; in every other case, either the planet or the civilization dies. The humans are unfazed. Repairing an ecosystem is possible, they say. We've proven it. Are proving it. Yes, there's a hurricane bearing down on us, but the storms get a little less intense every year.

This is a story about meeting people utterly unlike you and finding common ground with them. It's about imagining a better future and working doggedly toward it.

Eco-focused stories usually have a back-to-the-land, pastoral vibe; they want to get in touch with nature by reducing our use of technology as much as possible. That's not this book at all. Our heroes use neural interfaces and networked decision-making algorithms to manage the restoration of the ecology. They write algorithms that weight the vote in favor of community-defined ethical preferences. Technology isn't the enemy--corporations are, which is why the corps were exiled decades ago. Networks and algorithms can be powerfully good when they're used to benefit the many instead of the few.

This book has so much heart and so much beautiful imagery. It is gloriously weird in lots of ways I'm not going to spoil. It's a hopeful book that's giving me ideas I'm starting work on now. You can find it here or in your local library.