In Our Prime: An Excerpt

For the first time in history, the middle-aged make up the biggest, richest and most influential segment of the country, yet the history of middle age has remained largley untold. Here, an excerpt from the new book 'In Our Prime' by Patricia Cohen of The New York Times, fills in the gap, exploring the myriad definitions that make up a generation.
 

Author Patricia Cohen examines the concept of middle age.

Photograph: Fred Conrad