How about The difference of your country?
May be the serious difference exists your country.
Rich and Poor.
Rich people and Poor people.
Rich town and Poor town.
High educated people and No educated people.
High level university and Low level university.
Happy people and Unhappy people.
Who improve the situation?
No, they can't.
Nobody can improve the situation.
But the difference becomes bigger and bigger.
The difference may destroy the world.