Editor’s Note: When asked why, after thousands of years and millions of words, he felt that the world needed still another book arguing the case for God’s existence, Evan Sayet said: I wanted to write a book for the lay-reader…

In the 1950s and 1960s, 98 percent of Americans believed in God. Now, according to Gallup, just 74 percent do. This would seem to represent the advancement of the forces of reason over the forces of faith — except Americans…