I had written recently of my ignorance regarding the modern version of the Paleolithic diet and lifestyle, thinking that Loren Cordain devised it around year 2000. Then I found a medical journal article from 1988 outlining it, co-written by S. Boyd Eaton, M.D.
Mat Lalonde, Ph.D., in an interview with Jimmy Moore instead suggested that Cordain would credit S. Boyd Eaton, M.D., with the trend.
The Paleolithic Prescription: A Program of Diet and Exercise and a Design for Living was published in 1988 by Harper & Row (New York). The authors are S. Boyd Eaton, M. Shostak, and M. Konner.
Eaton and Konner are also the authors of “Paleolithic nutrition: A consideration of its nature and current implications.” in New England Journal of Medicine, 312 (1985): 283-289.
If you have evidence that the “modern paleo” diet goes back further than this, please leave a comment.