Babel's tower
At that time, only one language was spoken throughout the earth. When they emigrated to the east, the people found a plain in the region of Sinar, and there they settled. One day they said to each other: "We are going to make bricks, and to cook them on the fire." That's how they used bricks instead of stones, and asphalt instead of mixing. Then they said: "Let's build a city with a tower that reaches the sky. In that way we will become famous and avoid being scattered throughout the earth ».
Some Bible teachers also believe that God created the different races of mankind in the Tower of Babel. This is possible, but it is not taught in the biblical text. It seems more likely that the different races existed before the Tower of Babel and that God confused the languages, at least partially, based on the different races. From the Tower of Babel, humanity was divided based on language (and possibly race) and settled in various parts of the world