Something wicked this way comes; incensed, ravenous beasts, matricidal, snarling hordes. Invasive species, apex predator. We never had a chance.
Monuments of blood and stone reaching up to the heavens in towers, each of their dens its own Babel. Expand out, they cry. Build up. Dig down. Rip out its heart and throw it into the fires! Use its energies to feed the war machines! Cut everything in two! Break the bones, drink the marrow, split the essence!
But entropy ran out; expansion gave way to collapse. The process reversed; their emptied mines filled up with corpses, drained lakes drunk with blood, all their great sanguine works collapsing.
And now it comes down to you. Stand among the ashes of seven billion souls, your brothers and sisters turned to dust, cast your Ozymandian eye over the sands, and tell me it was worth it.