Europe is a part of the Atlantic coast.
This is a fact so significant that the North Atlantic has become a European sea.

The United States also is a part of the Atlantic coast: this is the dominant fact of American history.

China forms a section of the Pacific rim.

This is the fact back of the geographic distribution of Chinese emigration to Annam, Tonkin, Siam, Malacca, the Philippines, East Indies, Borneo, Australia, Hawaiian Islands, the Pacific Coast States, British Columbia, the Alaskan coast southward from Bristol Bay in Bering Sea, Ecuador and Peru.
As the earth is one, so is humanity.

Its unity of species points to some degree of communication through a long prehistoric past.