Soylent Green is the punchline of a bad joke told to me at the breakfast table by Channing, my 13 year-old son, but in a way it is fitting for this column about women executives in danger of being chewed-up by their corporate machines. And kudos to you if you caught the reference to Edward G. Robinson’s final film — about an over-populated world where people are recycled into cookies.

First up is Yahoo CEO Marissa Mayer, whom I’m told is rapidly losing the support of her hand-picked board. Mayer, who is expecting twins, will probably not be returning from her upcoming maternity leave and Wall Street has begun speculating about possible successors. […]