Little did they know, though, that time was coming to an end. You see, something amazing was coming. An ape born out of stone, hatched from his rock, he was waiting for his moment to pounce. He lived on the earth for hundreds of years before he learned the abilities he needed for his moment. He was friends with the monkeys in his jungle, big and small, but they all looked up to him. He protected them when they needed it, and he knew that one day he would be strong enough to overtake the humans.
It was difficult to train the monkeys, however. They weren't quite as smart as him or as strong. Over the years, many monkeys would die. But every time a new monkey was born, he would begin it's training. Soon, the monkeys called him the monkey king. Eventually, the monkeys that the monkey king trained begin to pass down what they learned to their children through DNA. They were beginning to become smarter and stronger before they even had any training. All the while, the humans lived their years in charge, unaware that their entire species was in grave danger.
After 300 years, the monkey king finally knew it was time to put his plan into action. With his strong, smart monkey army, with apes, gorillas, and monkeys of all sizes, he lead his army into the city. He knew the humans had guns and bombs that could take them out, but he also knew the humans would be so blindsided and confused that they would have no idea what to do. As they marched, the people of the town ran for their lives. It was the most terrifying thing any of them had seen. The monkeys tore through the zoos, releasing all of the animals, calling them all to join the army.

With all of the animals joining together, the humans were no match. It was clear that the only reason humans were so powerful was because the animals had not learned to rise against them. However, this army tore through tanks, powered through gunfire with no fear, and eventually took out every army in the world. The animals now ruled. Still, the monkey king was left in charge and called the Monkey King by all of the other animals. Humans were left alive, but locked in cages just as they had done with the other animals. Humans were now the pets and zoo animals of the world. The tables had turned and so they would remain until the end of time.
Author's Note: My story is based off of The Monkey King from Wihelm's Chinese Fairy Book, a story where an ape is hatched from stone, and he craves immorality. Over years, he learns many skills yet he craves more. He overtakes people and steals their power, until he is at war with Heaven. As I was reading this story, I immediately thought of Planet of the Apes. I decided to take some elements from both stories and combine them into a story where animals take over the world.