I still am embarrassed by this memory. Five years ago I walked into an office on the twenty-fifth floor of the Manhattan headquarters of Time Inc. (which owns Fortune.) I was there to meet with Time.com’s then managing editor and pitch a partnership idea, but once I took a seat and surveyed the endless photos of her small children spread across the airy space, I decided this editor was too much of a mother to follow up on the idea.

I still went through with my proposal, but I walked out sure I would never talk to her again. She wasn’t the first and only mother whose work ethic I silently slandered. As a manager at The Huffington Post and then The Washington Post in my mid-twenties, I committed a long list of infractions against mothers or said nothing while I saw others do the same.

• I secretly…