Awestricken by the magnificence - Part II

Do you know that all land on the Earth was single continuous mass? It is called PANGAEA. The whole land mass on Earth was one continent until cretaceous period. Look at the figure above to understand how gradually todays continents came into existence. Look at the small mass India which traveled as island before joining big Asian chunk! Due to Plate movements (Plate tectonics) underneath the layers of Earth, the land mass split and drifted away from each other to form todays continents. Universe is dynamic. All galaxies are moving away from each other every second.. Even Earth keeps changing.. But being ignorant of all this, we are very particular about our region, our language, our religion, our country, our nation everything about our our our... In fact the whole Earth was one.. But now so many differences crept in that we cant even imagine how it feels like having a single nation on it.. always human strove for predominance .. predominance over other country, other kingdom, other race..But doesn't it seem meaningless?? Being lucky to take birth on this beautiful Earth, shouldn't we live in harmony? After all its all one land!
We really don't care much about this .. But we give utmost importance to petty things we face every other day..
we strive hard to make money, get fame, build palaces but aren't these things ephemeral?
Why cant we just live and let others live happy? After all whatever we do is very insignificant in front of this magnificent Universe..