Inclusive Nationalism?

In the past couple of centuries, nationalism has helped many nations forge their own identity and liberate themselves from the clutches of imperialism.  However, by now, one of the consequence of nationalism is often deadly conflict, or even war by many name, within and across nations. 

Over the course of history, many nations have been merged and split up, most of the time involuntarily.  The boundaries of each nation expand and shrink.  Practically all nations had at least once been bigger (often as an empire) than its present incarnation.  It is true of many nations, such as Turkey, Russia, Austria, Hungary, Poland, Lithuania, Sweden, Egypt, Iran, Mexico, France, Britain, and many more.  Each can point to some place in an old map and say that “this piece of land was historically ours, we lost it due to aggression of another country.  It is a national shame.  We must rejuvenate ourselves and recover the greatness that is due us.”  

Because of shifting boundaries and other reasons, many ethnic Germans live in Poland, Romania, Czech, …, many ethnic Russians live in Ukraine, Belarus, Kyrgyzstan, … many ethnic Mexicans live in USA, …, many ethnic Chinese live in …, many ethnic Indians live in …, and vice versa.  This ethnic dispersion is the cause of many claims and counter claims, disputes, and wars.  

Each nation wants to recover its past glory, to be great again, to be as big and strong as possible, as safe and secure from aggression as possible, to be as wealthy and prosperous as possible.  Many governments demand that its citizens swear allegiance to this vision.  Dissenters are labeled as un-patriotic, traitors.  

But there is only so much land and so much wealth on earth,.  How are these competing claims to be resolved?  There is no way that both sides of a dispute can both achieve its  claims - while each side considers its claim to be sacred and un-negotiable.  Is it going to be determined by power and might again?  Do we really want to live continuously in a state of conflict and tension, even open war, between nations?  There is no shortage of countries who wants to be the dominant world empire which can then impose a reluctant order on others, making everybody else feel aggrieved.  By definition, there is room for only one dominant nation; all others become losers.  Even if some of these would-be world powers are satisfied with dominating its own region, there are only so many regions on earth; all others are still destined to be losers.  Losers will do all they can to rejuvenate themselves and topple the presently dominating nation. It will never end.  Is that what the world is destined to become, or remain in?  

Can there be a change of thinking, which allows people to live together, side by side, in peace?  Is there a viable alternative to nationalism, or a more inclusive form of nationalism?  If it turns out to be an oxymoron, what is the alternative? For the sake of each and everyone of the 7.7 billion people who share this earth, we need a more inclusive vision.  God help us.