Few aspects of this invariably remarkable world that we set out to chronicle four times a year are more frightening than those that may be generically grouped under the category of The Unknown. At times paralyzing, at times enervating, and often of unparalleled excitement, these twists and turns into the future must be dealt with if we are to assure the survival of our civilization, indeed our very species. Historians can examine the past, while journalists, politicians, bureaucrats, and scholars can treat the present, which is all around us. But the future must, by its very nature, remain Unknown and infinitely challenging. It is the warp and woof, the form and substance of these challenges—how we must and should prepare to deal with them no matter what form they present themselves—that we set out to explore in the Spring issue of...

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