Question

Why the whole world can't be a single country???
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Answer 1

Because it would create much chaos and trouble and would be very difficult to travel.

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Answer 2

because there are many religions and social groups are there and everyone follow their rules according to their religion so that's why there are so many countries ..if uu should ask about India ..India is very backward at the development bcoz of this as many people inganged in fighting for their religion..and in india there were many places that are formed on the basis of religion like Bengali usually lives in Bengal ....