Just for reference, I’m 70. If you had a population of candidates for executive and all else, experience, knowledge, etc. is held constant, I’d go for someone between 40 and 60. You get the best in mental acuity, physical health and other attributes necessary to be an executive. There’s a lot of social aspects that go along with the job, dinners, politicking, diplomacy, which tend to slip away in the more advanced years. There are exceptions, of course, but I think America would be best suited by someone who can walk up stairs and who doesn’t pause to sniff children’s hair.
I’m 83 and assert that one is still a wet behind the ears punk in the 40-60 age group. This phenomena just doesnt dawn on you until later in life when it’s too late to make amends for your blunders.