Historian and author Hillel Schwartz. His latest book is "Century's End: A Cultural History of the Fin-de-Siècle From the 990's through the 1990's." (Published by Doubleday.) According to Schwartz, certain events happening now, as we approach the year 2000, are part of a pattern that repeats itself at the end of each century. Schwartz's earlier book about dieting, "Never Satisfied: A Cultural History of Diets, Fantasies, and Fat," has just come out in paperback. (Published by Anchor Books, Doubleday.)