The page "Why Age 60?" was pretty upbeat. I don't know how to feel about him referencing a ST:TNG episode for justification of suicide. http://www.zeroshare.info/why_age_60

Lots of duplicates of this already:

https://www.hnsearch.com/search#request/all&q=manley

Sorry, I didn't see those. I count on the site to flag for duplicates. Apparently it can miss some.