The Sweetest Dream: A Novel By Doris Lessing HarperCollins 496 pgs. $26.95 ISBN: 0-0662-1334-7 Changing the worldBy Steven Martinovichweb posted June 3, 2002The most insightful critics of social and political movements may be those who were once in their vanguard. Novelist Doris Lessing would certainly qualify as an expert in counterculture movements. A communist in her youth who abandoned three children when she moved to Africa, Lessing has long been considered one of the preeminent voices of her peers.Among Lessing's most recent projects was a three-part autobiography. As her author's notes indicate, The Sweetest Dream: A Novel will take the...