By and large, reading is a solitary activity. True, on a nightly basis, plenty of folks tuck little ones in with enchanting bedtime stories. (Apparently, my favorite as a toddler was called "The White Cat," an old yarn involving-of course-a cat, one whose head had to be lopped off by his ladylove before he could turn into a human prince, but let's drop that and move on.)
When Everett Rogers introduced the S-shaped diffusion curve in the first edition of his book, he was directly following the data. Researchers like Elihu Katz had already begun studying how change spreads and noticed a consistent pattern in the adoption of hybrid corn and the antibiotic tetracycline. Yet it was Rogers who shaped our understanding of how ideas spread. Publishing more than 30 books and 500 articles, he studied everything from technology adoption to family planning in remote societies.
