After the 1960s it gradually started being practiced across ethnic and religious boundaries.

People are often married across ethnic and religious boundaries.

Music is something that transcends language and national or ethnic boundaries.

As with many other new African states, the borders of the country did not reflect earlier ethnic boundaries.

Your speeches cut completely across ethnic and religious boundaries.

He looks like a leader, and his name could have been invented for a passport to cross the maze of ethnic boundaries.

There are no ethnic boundaries down here; money is the joining factor.

It crosses cultural, ethnic, social, and geographic boundaries to teach greater awareness of our nation's natural resources.

Others still draw on the poetic history of the province which transcend ethnic and religious boundaries.

See here for one of the many maps that illustrate Africa's ethnic boundaries.