Re: We are all humans first....
Dissolution of borders will not happen without actually having a single government to 'rule' the planet. I don't know about you, but I don't know any government, except with me as Supreme Chancellor of Earth, that I want in charge of everything.
Borders are like giving your kids separate bedrooms. You don't have to do it, but it greatly reduces the chances of the weaker ones getting killed in a violent territorial dispute.