I think that this song is a reference to how humankind has very harshly destroyed our world, Earth, and how if we do not work on a way to better our planet, we will soon be found in ruins. I think that it is also a reference to how inhumane mankind is, and how there is so much violence, mayhem, and destruction that everything is as good as gone, even if mankind denies it, or tries to ignore the cruel fact that we are nearing the end, not because of anyone else's fault, but because of our own.