"The People of Sand and Slag" by Paolo Bacigalupi (Score 1)

I read this short story in The Year's Best Science Fiction: 22nd Annual Collection, edited by Gardner Dozois. Frankly, it broke me. It's about a moment that defines the point at which our humanity is lost. Not a moment of evil, just a moment of losing what makes us human... and how easily it can slip away. I was upset for months. And I'm not even a dog lover.