Historical documents like this provide evidence again the “hedonic treadmill” theory (or at least some interpretations of it). Losing family members to disease was common in Carnegie's day, but that didn't make the tragedy any less for him: pic.twitter.com/jwOP12wESV

If you read books like Bernard Baruch’s autobiography about his investing a century ago, you learn he 1) invested in cutting edge technology and growth investing like steel mills and copper mines and 2) he frequently invested in private companies that subsequently went public twitter.com/ebitdaddy90/st…