one (not) significant thing

that one thing.

why should it exist in this world? or, why is there so much kind of it in this world?
i'm tired to face this kind of problem.

look what it has done.

in history, people war (even until now).
lovers fight, even separate.
discrimination.
people can't be with the one they like/love bcos of difference in it.

can't it be just one? i think this world is gonna be easier than now.