cockroaches.

The tower rose. As the builders continued to place metal upon metal, piece upon piece, the tower rose. It rose, at first, to nothing more than a few feet above ground. A few feet above the cockroaches, as they scurried beneath the metal. But as the builders saw elevation take place and the possibility of building a structure up away from the cockroaches, they hurried. They placed more metal upon metal excitedly. Look, they would gesture to one another, look below-- the cockroaches diminish with each new piece. The more pieces they placed, the higher the tower rose. The higher the tower rose, the less visible the cockroaches became. Soon, nothing below them was visible. Soon, the tower rose up above the clouds where the air was thin and the sky was cold. Soon, there was nothing beneath the builders but sky. They were God-like. They had built the tower higher than any man-made point and even above some made by nature. They continued to build. Why stop now, they argued. In time, they forgot what it was they were trying to get away from. In time, they forgot that anything beneath them had ever existed. All they knew was the tower, and that something had initiated them to build upwards.
But down below the cockroaches did not forget. Down below, the cockroaches were left behind as they watched the builders disappear into the sky. The cockroaches wondered what was so great about the sky, and what could possibly drive the builders to build in that direction. The cockroaches wanted to climb the tower and explore the sky, but they didn't. They were too afraid. The only thing the cockroaches knew was the ground, and they knew they belonged to it. Will the builders ever return, they wondered. Why did they disappear into the clouds? After some time, the cockroaches knew the builders would not return. Every once in a while one would fall to the ground in a terrible accident, and his body would splatter across the concrete like an egg. But no other builders would come down after that. It was almost as if they had let one fall, and considered it a small price to pay for the direction they were heading. What was so great about being in the sky, the cockroaches wondered.
Sometimes, not often but sometimes, a few of the cockroaches would get angry. They would circle around the foundation of the tower and think to themselves... if we just disassembled one leg, they would think, if we just disassembled one leg the whole structure would fall...