“The United Seas” by Robert W. Rogers is a book about the Panama Canal. It reveals an interpretation of the opening of the Panama Canal, commemorated by the Panama-Pacific International Exposition. Excerpt: “We are living in a day when it would almost seem that the person who does not value vision is neither helpful nor wise. For it is a day when the people everywhere need an essential vision in order that they may gain courage to settle down to constructive effort after the close of the world war. In other words there are multitudes who feel that there is a far deeper significance to the opening of the Panama Canal as commemorated by the Panama-Pacific International Exposition than what appears on the surface.”