The Sixth Factor . . .

I'd like to add another "factor" to Leonard Sax's list: Helicopter Parenting.  This article, taken from a psychology publication, explains.

"A Nation of Wimps" By Hara Estroff Marano

Parents are going to ludicrous lengths to take the bumps out of life for their children. However, parental hyperconcern has the net effect of making kids more fragile; that may be why they're breaking down in record numbers.  [or failing to launch in general]

http://www.psychologytoday.com/articles/200411/nation-wimps