The Fourth World War took place in 2333 and ended after only one day.

Among them, there are 49 developed countries and more than 70 developing countries in the world. There are more than a dozen underdeveloped countries that are all caught up in this war, but the United Nations, which has a sound system, has no way to deal with this war.

It is impossible to know which country launched the ICBM first, and then the countries that were harmed by nuclear weapons began to fight back against the countries they felt threatened.

In this way, more and more countries have been harmed by nuclear weapons, and they have also bombarded other countries one after another.

It was the first nuclear war in mankind, and with the exception of a few neutral countries, almost ninety percent of the countries either possessed new types of nuclear weapons or were developing them.

Almost every developing country has several nuclear bombs, and this day is known as World War IV or World Nuclear War I.

A day later, the world's population had plummeted by 70 percent, and even the North and South Poles were spared a nuclear bomb.

Nuclear radiation is so severe that news is blowing in various countries and regions that the earth is no longer uninhabitable.

The whole planet is filled with nuclear radiation, and when it is even more serious it is not known which country dropped the chemical and biological missiles.

These chemical and biological missiles begin to emit heavy smoke when they touch the ground, and each missile can pollute about five kilometers of air on average.

Transmitted by the air, with time and wind, it can even drift and oscillate up to ten kilometers or more.

These biochemical gases enter the body through the olfactory organs of humans and animals, and then travel to other parts of the body through metabolism.

This gas affects the human brain and nerve centers, and the affected human mind begins to become sluggish and clogged.

It can only instinctively maintain the most basic eating, drinking, and Lazar thinking, and it is inherited from generation to generation through DNA to the next generation.

In the years that followed, fewer and fewer humans survived, and their IQ gradually declined to the point where they could no longer think and only know how to hunt for survival.

Ten years after the Fourth World War, humanity died out completely.

The only remaining humans no longer have the appearance of humans, and look more like wild people who drink blood.

Other species of animals have no effect, while mammals like humans do.

Some mammals have been irradiated to have the opposite effect of humans, and they have actually improved their intelligence.

Among them are the felines and canines, which were originally raised by humans without worries.

The double whammy of a biological and chemical missile attack and a nuclear leak has also affected DNA changes, with the biggest change in body size in a decade's time.

As the body size increases, the brain also grows and begins to walk upright.

After subsequent survival, I learned to use tools and fire. And eating cooked food produces a language that can communicate simply.

These cats and dogs are like our ancestors, living in the ruins of nuclear radiation.

Governments, armies, cities, and faiths evolved, and the wreckage of human destruction was reconstructed.

Around the world, there are rebuilt homes led by cats and dogs, as well as other mammal homes.

Seals, pandas, even platypuses and even elephants, but marine mammals have not changed at all.

But no matter what animal home it is, it's always the cats and dogs that take the lead.

The dog's loyalty is instinctively inherited and is better suited for military and manual work.

And part of the nature of cats has also been inherited, and in order to be lazy, they have begun to control the number of leaders of the country and the core members of the sect.

Hundreds of years of evolution, these cats and dogs as the core of the big country.

The country's leadership has almost reached seventy-three percent, seventy percent of cats, two percent of dogs, and one percent of other animals.

The cats began to slowly falsify history, completely removing the chapters of human domination found in history, destroying all the artifacts of human civilization that were left behind, and beautifying some of the indestructible natural wonders and large buildings as the products of the cat gods.