RE: The Generation Blame Game

I read a book recently enough to sort of remember the contents but not author or title. The gist was these "decades" generations go back in time really far, and each has a name, a "characteristic" and a creating event(s) during their "decade". Actually I think the "decades" are like 13 to 16 years long, not all the same length. It was a fascinating book but alas, no title comes to mind. Gotta love brainfog...