We launched Lived History, a special section of TheNation.com, to honor, remember and pay tribute to the dearly departed who have made significant contributions to bettering our world. Each week we feature a remembrance of a member of the progressive community, either well known or more anonymous, whose remarkable accomplishments demand recognition. In the process, we hope to be able to highlight and recover some of the more important but often obscure periods of US history that demonstrate the progressive tradition in American life. Here are twenty of the notable individuals we lost in 2011.