Humankind is one

Can there be a world without barriers of boundries? I think humanity is yet to develop fully. Though this is an idealistic situation and history of human evolution is at odds with this, I am sure our civilisation will reach a point when we do not discriminate between nationalities or races. There is another pssibility- this civilisation may be wiped out completely and humans evolve afresh as per the vision of the mysterious creator. It appears we have created such havoc in terms of ecological disater and many artificial boundries. We may either realise the folly or be prepared to face the upheaval.