My eye was caught recently by obituaries of Brenda Barnes.  She was obviously a remarkable woman: third of seven daughters of a pipe fitter who started as a nightshift mail sorter in Chicago and rose to be CEO of Pepsicola. In 1997 Barnes resigned, choosing to focus on her three children - sparking a major debate on worklife balance on the one hand, and whether she had 'betrayed' the cause on the other (just as Anne-Marie Slaughter did 15 or so years later). Barnes had cracked the glass ceiling once (and in this case the metaphor is apt;  though in general I prefer to focus on levels below these top…