Global Nationality

We came from different nations, with different characters, with different beliefs but what of our future if we look at the time and look back at the past every tribes didn't start as a tribes but it came from a small group of people and grow more bigger and bigger and swallow smaller groups, what of our nations today? it didn't start as a nation at first but start as a many little groups of people becoming one. Now let's look into our future if the cycle of of having one small group become bigger and form a bigger group doesn't stop in the future all 7 continents will be under one rule and then the world will be called a nation on its own.