I think the average age for a man to live in the 1980's was around 70. https://en.m.wikipedia.org/wiki/Life_expectancy#/media/File%3ALife_Expectancy_at_Birth_b

I think the average age for a man to live in the 1980's was around 70. https://en.m.wikipedia.org/wiki/Life_expectancy#/media/File%3ALife_Expectancy_at_Birth_by_Region_1950-2050.png https://en.m.wikipedia.org/wiki/Life_expectancy#/media/File%... Considering his intelligence and age, I'm sure that it was convincing at the time. These days more people are living into their second century: http://www.smithsonianmag.com/smart-news/there-are-more-americans-over-age-100-now-and-they-are-living-longer-180957914/ http://www.smithsonianmag.com/smart-news/there-are-more-amer... http://www.npr.org/2016/03/30/472442367/in-one-italian-village-nearly-300-residents-are-over-100-years-old http://www.npr.org/2016/03/30/472442367/in-one-italian-villa...