[KerrickStaley]

And in this case, you could easily imagine the arrow of causation pointing in the other way. If you have the good fortune of being generally healthy, and make enough income to have access to good healthcare, it's likely that you will live to 85. But these same factors also make you a likely optimist.

[halflings]

Just copy-pasting neonate's quote from the article, responding to a similar comment:

_That finding was independent of other factors thought to influence life's length — such as "socioeconomic status, health conditions, depression, social integration, and health behaviors"_

Literally the second paragraph on the article.

Read the article before posting comments, folks! :)