Re:4 a.m. Is the Most Productive Hour
by StavrosK on Wednesday August 24, 2016 @08:44AM
(#12351581)
Summary: The secret to happiness is good relationships with other people, and the bane to happiness is loneliness. This agrees with my own observations as well.
Robelt Waldinger seems to (partially) disagree:
https://www.ted.com/talks/robert_waldinger_what_makes_a_good...