"A Difficult Woman," by Alice Kessler-Harris During the great performance that was her life, Lillian Hellman always addressed the 20th century from center stage. While she defended many causes - justice, loyalty, American civil liberties, anti-fascism and Soviet-style Communism among them - what she represented most staunchly was herself, and what she believed in most fiercely was her own unassailability. The Challenging Life and Times of Lillian Hellman By Alice Kessler-Harris Bloomsbury Press. $30. She was first and last a dramatist, with a genius for the concise phrase and the provocative gesture. Shrewd plotting and a talent for dialogue were hallmarks of the hugely successful plays, movies and memoirs she wrote. But two crystalline expressions of her own life's high drama are more memorable than any story she ever spun: her pithy rebuke to the House Un-American Activities Committee in 1952 ("I cannot and will not cut my conscience to fit this year's fashions") and the 1976 Blackglama advertisement for which she posed, enrobed in mink, her 71-year-old face alight with both amusement and confrontation. From her earliest days she sought the spotlight. Once it was on her, she basked in it until the end. Her friend Richard de Combray commented that when she died in 1984 at age 79, "she wanted to pull all the scenery down with her." "To read Hellman, even to read about her, is to start an argument," one of her biographers has noted. Complex and wide-ranging, these arguments have their roots in the 1930s and continue in our time. They fall roughly into a couple of categories. First is the condemnation of Hellman's insufficiently recanted devotion to Stalinism. Second are the accusations that she fabricated major parts of her best-selling memoirs, which ignited a debate about the ethics of fictionalizing the truth that continues, with les affaires Frey, D'Agata and Daisey, to smolder today. In every arena and on every count, Hellman vigorously defended herself, aided by her many friends and admirers. As that same biographer put it, "She had to be not only right but victorious." Always the challenger, Hellman did her best to thwart all unsanctioned accounts of her life. She forbade her friends to talk to inquiring writers and destroyed many of her personal letters. Nonetheless, a half-dozen biographies have been published since her death. The best of them is Carl Rollyson's "Lillian Hellman: Her Legend and Her Legacy" (1988), a critical but astute portrait. Nearly as good are William Wright's "Lillian Hellman: The Image, the Woman" - a stouthearted book that did its best with limited sources, having been the first to appear, in 1986 - and Joan Mellen's "Hellman and Hammett" (1996), an unsparing psychoanalytical examination of Hellman and Dashiell Hammett, her longtime lover and mentor. For day-to-day glimpses of Hellman in her later years, nobody has captured the anger and the humor, the caprice and the stubbornness, the flattery and the bullying, as vividly as her friend Peter Feibleman in "Lilly: Reminiscences of Lillian Hellman" (1988). Weighing in on the controversies, Hellman's biographers are divided between antipathy and admiration for her; yet all defer to the force of her personality and the power of her celebrity. Into this circle of Hellmanologists enters a new participant: the historian. Alice Kessler-Harris is a Columbia University professor who has spent a distinguished career studying American gender and labor history. Deeply impressed, as so many readers were, by Hellman's memoirs when she first read them in the 1960s and "70s, Kessler-Harris wonders how such a venerated figure can have fallen so far out of favor as to be widely perceived today as "the archetype of hypocrisy, the quintessential liar, the embodiment of ugliness." Instead of probing inside Hellman's character for answers, Kessler-Harris searches outside, "by thinking through her relationship to the 20th century." She explains: "I seek not only to explore how the world in which Hellman lived shaped the choices she made, but to ask how the life she lived illuminates the world she confronted. . . . I ask as well how a changing political environment influences popular perceptions of her life. The book is thus not so much a traditional biography as a series of biographical reflections divided into themes: Hellman as Southerner, Jew, woman, playwright, wage earner, radical, moralist and accused liar. Donna Rifkind has written for The Washington Post, The Wall Street Journal and other publications.