I was recently gifted a vintage book on "modern" quilting from the 70's, and I thought it was very interesting to see that a lot of things that I see in current "modern" quilts are not new ideas; or at least not as new as I thought they were.
Things like improvisational piecing, lots of large pieces of solids, and a focus on the quilting - those are all things I thought were relatively new trends in modern quilting, but apparently they've been around (and identified as "modern" quilting) for quite some time!
So...how old can something be, and still be "modern"?
It's definitely the most interesting of the "old" quilting books I've come across. I can't remember the name of it off the top of my head, though.