Sears's followers call this progression "attachment parenting" and it seems to have something to do with attachment.
I think my dissertation and Sears's book have two different definitions of attachment.
The nearby Sears store delivered a sleeping bag, Coleman stove, and all sorts of camping gear for the modern outdoorsman.
Old English searian (intransitive) "dry up, to wither," from Proto-Germanic *saurajan (cf. Middle Dutch soor "dry," Old High German soren "become dry"), from root of sear "dried up, withered" (see sere). Meaning "cause to wither" is from early 15c. Meaning "to brand, to burn by hot iron" is recorded from c.1400, originally especially of cauterizing wounds; figurative use is from 1580s. Related: Seared; searing.