Have we crossed all borders to keep borders in place?

To be honest with you, I do not know how to start. You always need a good “punch-line” to grab the attention of the reader. I have none. I’m not trying to play the game of claiming I don’t have a hook to pull and use that claim as the hook. Honestly! So let me get to the point straight. Whats up with all these borders? Seriously, why do we need them? Are we still hunter gatherers who are too scared that the neighbouring tribe will consume-off all our food sources? Are we trying to keep the others off from our women and children? If they want to and work towards it, they will get them all with borders in place too. The American TV soaps will do that anyways.
By having borders in place we along with our brilliant ancestors have bred all animosities as possible between all people. Have borders prevented man killing man (and women alike)? Whats with the refugee thing and seeking asylum? Why can’t people feeling unsafe in a place just move to other and feel at home? Why are we still not civilised enough to unite all mankind? Are we not social animals? It looks very much like we are more animal-like than being social enough.
If India opens up its borders to Pakistan, one might say, will bring in all the terrorists in – to quote an example. But aren’t they getting in anyways? At least when you open up you will have more people gushing in seeking fresh pastures and people can see that the ones on the other side are not any different.
We might not be ready yet for this utopian dream, but I wholeheartedly feel that we should be working or at least thinking towards this end – the end that will bring all mankind together. It is heart aching to see us still going on with separatist ideologies. I can see no difference between the separatists within a country from a so called patriotic nationalists. It is high time we stop this madness and work towards the goal of being children of the universe.