Like we baby boomers tend to do, I always pause when notable public figures from my young years die. This is true even if I didn’t like or appreciate their work or their persona. This pause is an inner reaction to the reminder of the passage of time, and is a sort of superficial memento mori. Yesterday, a pop star and a country star from my youth died on the same day, at the same age. Mac Davis and Helen Reddy, both 78, departed this life. Ms. Reddy was reportedly in a nursing home with Alzheimer’s Disease, and Mr. Davis had recently undergone cardiac surgery. I was not a fan…