There are more women over 50 in this country today than at any other point in history, according to data from the United States Census Bureau. Those women are healthier, are working longer and have more income than previous generations.

That is creating modest but real progress in their visibility and stature.

“Age — don’t worry about it. It’s a state of mind,” Ms. Zirinsky said on Tuesday when asked about the effect of her age on her new job. “I have so much energy that my staff did an intervention when I tried a Red Bull.”

[‘She Literally Never Stops.’ CBS News Turns to Susan Zirinsky]

Men, of course, have led major organizations well into their seventh and even eighth decades, retaining their power and prominence. But the #MeToo movement has toppled some high-profile males, from 77-year-old Charlie Rose to Les Moonves, 69, who was ousted as head of CBS after multiple allegations of sexual misconduct, creating unexpected openings for the elevation of women.

And Susan Douglas, a professor of communication studies at the University of Michigan who is writing a book on the power of older women, said “a demographic revolution” was occurring — both in the number of women who are working into their 60s and 70s and in the perception, in the wake of #MeToo, of their expertise and value.

“Older women are now saying ‘No, I’m still vibrant, I still have a lot to offer, and I’m not going to be consigned to invisibility,’ ” she said. “These women are reinventing what it means to be an older woman.”