9-Enders (nine-enders)

Nine-enders are people in the last year of a decade, say, 29, 39, 49, 59. Adam Alter and Hal Hershfield, who introduced the term, propose that as we approach the end of a decade we are more likely to do a kind of "meaning audit" of our lives. And in the years just before the end of a decade, if we may have fallen short or feel there’s something else we want to accomplish, we’re much more likely to do it then than in any other year of a decade.

In practice, as Dan Pink shared in his book When: The Scientific Secrets of Perfect Timing , these are, therefore, the times when we’re more likely to do something extreme like running a marathon for the first time and, sadly, also committing suicide.

Take care out there.

Read more in Dan Pink’s Atlantic article: You’re Most Likely to Do Something Extreme Right Before You Turn 30, Dan Pink, The Atlantic

Or:

When: The Scientific Secrets of Perfect Timing, Dan Pink

People search for meaning when they approach a new decade in chronological age, PNAS, vol. 111 no. 48, Alter and Hershfield, 2014 .

This sketch, updated and polished, features with a number of others in my book Big Ideas Little Pictures.