What would happen if there were no borders?

If borders were lifted between the countries that had and keep having international territorial disputes that would only deteriorate situation related to peace and security:once minorities of a neighbouring country would relocate to the territory of another country where they could grow without any limit,they could start demanding respective new policies regarding their native language use,representation in government structures and understanding of the local history. Therefore lifting borders between countries that have a long history of hostile relations could lead to exacerbation of the situation and is not a good idea.

On the other hand if two countries with similar level of economic development and friendly relations cancel border controls between each other, it could lead to intensification of international business between them, development of cultural relations and better prices for products and services if there is price competition. To be able to enjoy these benfits in the long-term neither of the countries should be facing problems with uncontrolled flows of migrants and refugees at any of its borders.