There is a problem with borders. If you are born on some peace of land you belong to some country and then you are part of one big tribe. Now, politicians will use that idea, that you are one nation just because you are born on same teritory and sometimes make you think your nation is best. For example , I am born in Serbia but I am also born on this planet called Earth, well , we all are. So, politicians will make borders just to form country , so you have to pay taxes, and become their slaves until you die. It's simple, none country can control criminal in so huge area, which mean people should live as smaller tribes where they can control criminal . For example, most common thing is U.S.A. alliance. The people call them self top country in the world. Well, of course it will be top because all different races live in it. Do you see my point? All races in one place is equal best solution. So , why borders then? When all races can live together globaly. I am bored writing more since some lazy people will answer tl;dr.