Honestly, this could’ve inched into a 5 star level - the world creation, the characterization, the detail and love that’s gone into it are sublime and, even if it’s not a future I hope for, its eminently believable and realistic - but for the heavy handed proselytizing. The tired, bullshit old “no atheists in foxholes” trope comes into it early, and very nearly stopped me dead in reading it. I persevered, and I’m glad, but the religiosity is pervasive and very off-putting. I enjoyed 95% of this book, I just wish the 5% I didn’t hadn’t been so tie-curlingly excruciating.
Drop the sermons and stick to writing damned good sci-fi.