Around the turn of this century, everything looked so promising for women. Twenty years after Sherry Lansing had broken the glass ceiling — well, one of many glass ceilings — when she became the first female production president at a major studio (20th Century Fox), other women were all around, their names popping up in any conversation about leadership roles. Stacey Snider was named chairman of Universal Pictures in 1999; Amy Pascal got a parallel job at Sony Pictures in 2003, four years after she had become chairman of Columbia. Their gender, just like that of the other women who started to run networks and cable companies and production houses, didn’t seem to matter. Then something went wrong. Rather than see a wave of women join them at the top, the movie business, at least, took a step back. Brad Grey replaced Lansing at Paramount and in turn was succeeded by Jim Gianopulos; Tom Rothman walked into Sony when Pascal walked out; and suddenly only one woman was left runnin