God created human beings and only one earth , But we human beings create caste , Religion , Sub caste and we divide ourselves and we divide this earth among ourselves as continents ,Nations, States , Cities , Streets . Atlast god create this world for human beings to live together but we create unnecessary things and we separate each other by these things and sometimes fighting for these things WHY?

Because of evil and desires in the heart of man.

If you follow the Old Testament we see man had gotten where they thought they were going to build a tower to heaven. They believed they were so great and powerful and smart, they could do it. God then changed the language they all spoke and made divisions among them.

Also we see in the Old Testament that God created some ranks and groups, among the people, rulers or judges to be over them, and groups to be priests.

Interesting question. Fr_Chuck answered nicely... mostly it is because of the evil desires of man's heart. And the majority of vice and sin is going to be found among the larger populations of the world.

I don't believe this division was part of God's original plan, but rather was brought about by necessity.
I believe the worst example of this type of division is found in Christianity itself, representing the demoninations we have created.

Also with that, I may not agree God only created one "earth" we have no idea what he may have done before, or what he did in other places, We are only told what he has done HERE

The mess started in the Garden of Eden when man disobeyed God and ate of the tree of the knowledge of good and evil. And until Jesus comes back to rule and reign for 1000 years man will continue to be divided. But Fr- chuck has a great point. God himself gave mankind different languages.

However, Fr-chuck.. you lost me on your last post. God created the heavens and the earth. EARTH is not plural. So we are told. Just saying my friend.. just saying