When it comes to speculation, there are no national boundaries.

The working class has no country and national boundaries must be eliminated.

Even thinking in terms of national boundaries was considered old-fashioned.

What does a national boundary mean if your children are starving?

Scholars must be free to work with one another across national boundaries.

We must also remember that this is a conflict with no natural national boundaries.

Given the likely benefits of cooperation, why should it stop at national boundaries?

It is about helping small companies trade across national boundaries.

However, free movement is a prerequisite for people to be able to meet across national boundaries.

The problem of violence against women knows no national boundaries.