this was never a big happy strong place were everyone got along.
Thousands of tribes/languages is impossible to unite.
Geographical and ethnic barriers pretty much kept folks apart-except for travellers/traders/armies etc.
Colonists made borders that suited them and ended up making strange bedfellows of former neighbours.
To answer your question,no.
But..can we all live peacefully and have some form of cooperation-on the economic level,eg.EU-,remains to be seen.