Because there the Lord confused the language of the whole world

Genesis 11:1-9
Now the whole world had one language and a common speech. They said to each other, “Come, let’s make bricks and bake them thoroughly.” They used brick instead of stone, and tar for mortar. Then they said, “Come, let us build ourselves a city, with a tower that reaches to the heavens, so that we may make a name for ourselves; otherwise we will be scattered over the face of the whole earth."
So the Lord scattered them from there over all the earth, and they stopped building the city. That is why it was called Babel—because there the Lord confused the language of the whole world. From there the Lord scattered them over the face of the whole earth.
Babel sounds like the Hebrew for confused.
Here is another ancient story, accounting for the way things are. Why are we divided? Why are there so many different languages? The tale of humanity's downfall does not tell it all. This story attempts an explanation.
In Shinar kingdom of Nimrod the hunter, people get together on a great building project - a city and a tower with its tip in the heavens. God looks down at this cooperative effort and sees it as the beginning of the worse rebellion against him. So he divides people by language and scatters them abroad - the very thing they were trying to insure against. The great tower remains forever unfinished.
The tower of Babel (Babylon) was in all likelihood a multi-storeyed temple - tower, or ziggurat, similar to those developed in Babylonia in the 3rd millennium BC.
Why?
People wanted to do something like God made men.
They wanted not to be scattered over the face of the whole earth, which was against the command of the Lord.
Babylonia has the best Astronomy but when it was distorted into astrology.
Chapter 9 talk about the language of three descendants of Noah.
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巴別塔的時代，法勒是分開的意思，即洪水之後101年，當時挪亞還在，但是人心裏仍然剛硬。科技與研究、政治與社會。人有智慧聰明，顯明在科技上。建塔時的組織，商議就是政治與社會的特質。人有智慧能力，向神求智慧能力，沒有拿來用於榮耀神，豈是為人利己效力呢?彰顯自己的能力，還是拿來幫助人。榮耀神呢?人想要通天，想要留名，想要存到永久。人卻不願遵循神的途徑。造城造塔與道德沒有關係。但是喜歡留名。人要真正留名只有透過耶穌基督，通到天到天上。無論人塔造多麼高，離神還是很遠。人可以為自己的前途奮鬥，只有透過基督才能永遠存在。

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How?\
God's punishment sometimes is good to human beings.