Fear God and Take Your Own Part (1916), by Theodore Roosevelt

Fear God and Take Your Own Part was a followup to Theodore Roosevelt's 1915 book, America and the World War.  That earlier book was a collection of writings by Roosevelt in late 1914, after war had broken out in Europe.

In Fear God and Take Your Own Part, Roosevelt wrote about the response of the United States to German aggression during the war, in particular the sinking of the Lusitania in 1915, which caused the deaths of many United States citizens. 

The book used the American response to the war as a starting point for general criticism of the Woodrow Wilson presidential administration's foreign policy.  That criticism also targeted the handling of a skirmish along the Mexican border that involved the deaths of several Americans on U.S. soil by Mexican invaders.

Throughout the book, Roosevelt emphasizes the importance of action over words. He criticizes the United States for its lack of military preparedness.  He also writes about declining an invitation to appear at a conference that condemns Turkey's violent actions towards Armenia, because he didn't think that the conference would make any real difference in Armenian conditions.

Like many books written during World War I, events quickly made some of its contents out-dated.  The book was originally published in February 1916, following a speaking tour by Roosevelt that formed the basis for much of the book.  The book went through several editions, with one edition including an April 24, 1916 introduction by Roosevelt in which he talks about the latest developments in the Mexican border conflict and in Woodrow Wilson's communications with Germany.

The foreign policy focus also includes a discussion of U.S. immigration policies that resonates with the same kind of rhetoric used in similar discussions in the 21st century.   

As for the hyphenated Americans, among the very many lessons taught by the last year has been the lesson that the effort to combine fealty to the flag of an immigrant's natal land with fealty to the flag of his adopted land, in practice means not merely disregard of, but hostility to, the flag of the United States.