In this Monday, Jan. 14, 2013 photo, author Martin Ford, 49, poses for a portrait in San Francisco. Ford's book, "The Lights in the Tunnel" describes a nightmare scenario where machines leave 75 percent of American workers unemployed by 2089. Consumer spending collapses. Even those who are still working slash spending and save everything they can; they fear their jobs are doomed, too. (AP Photo/Jeff Chiu)

Associated Press
In this Monday, Jan. 14, 2013 photo, author Martin Ford, 49,  poses for a portrait in San Francisco. Ford's book, "The Lights in the Tunnel" describes a nightmare scenario where machines leave 75 percent of American workers unemployed by 2089. Consumer spending collapses. Even those who are still working slash spending and save everything they can; they fear their jobs are doomed, too. (AP Photo/Jeff Chiu)
In this Monday, Jan. 14, 2013 photo, author Martin Ford, 49, poses for a portrait in San Francisco. Ford's book, "The Lights in the Tunnel" describes a nightmare scenario where machines leave 75 percent of American workers unemployed by 2089. Consumer spending collapses. Even those who are still working slash spending and save everything they can; they fear their jobs are doomed, too. (AP Photo/Jeff Chiu)
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