Although citation is needed, if I remember correctly, because of lacking healthy young Japanese men after WWII, ageing fathers' sperm contributed to at least as much to newborn malformations as the nuclear fallout.
But the thread also tells you about the euphemism under the guise of 'ego' in the article, and how society today is structured (ie. power of the old vs. youth in our times). At his age, he should clearly let go, by all standards, even if it so difficult. To quote a famous speech from another control freak who at least knew all about this, luckily Nature has provisions because it "clears out the old, to make room for the new. Right now the new is you. But you won't always be."
It's interesting that you mention the Japanese, because when I looked into it awhile ago, I could find no evidence of any increase in birth defects following the bombing. I could swear that we had pictures of deformed children in a textbook as a kid, so I started Googling it, but the only things I turned up said "no statistically significant increase".
But the thread also tells you about the euphemism under the guise of 'ego' in the article, and how society today is structured (ie. power of the old vs. youth in our times). At his age, he should clearly let go, by all standards, even if it so difficult. To quote a famous speech from another control freak who at least knew all about this, luckily Nature has provisions because it "clears out the old, to make room for the new. Right now the new is you. But you won't always be."