"The Warning" was our first introduction to Buddy Korda, a mild-mannered banker who was the unlikeliest of prophets. He began having nightmares and then, unmistakably, received the message: It is coming Forty-one days. The awful deadline left Buddy frightened and confused. Speaking about what he knew would threaten his job, his family's security, even his life. The prediction that America faced a historic economic collapse went against every expert's...