Over the years, she’d trained several smarmy young men who’d gone on to become high-ranking executives. At the time, Jo had assumed it was her fault she’d never risen any higher. The men they’d promoted weren’t juggling a job and motherhood. They never had to scramble when the day care was closed or the babysitter called in sick. So Jo had watched as men who weren’t as smart or diligent or trustworthy as she was worked their way past her toward the company’s C-suite.