Yep. Do NOT miss Pournelles anthologies There Will Be War, of which there were around 10 volumes. See also Spider Robinson's material, his most recent compilation of essays is entitled...The Crazy Years.
The idea of what sort of blog or other internet presence Robert Heinlein might now be producing had he survived into his centennian years he was born in 1907 so would now be 101 years of age] is fairly awe-inspiring. But I suspect it would sound quite a bit like Jubal Harshaw, Lazarus Long, Bernardo de la Paz and Colonel DuBois from Starship Troopers all rolled into one. As it of course should.
I’ve read everything Pournelle and Niven-Pournelle have written, including the complete There Will Be War series, and especially the non-fiction. If you haven’t read Strategy of Technology, written with fellow Cold Warrior Stephen Possony, I recommend it highly.
http://www.jerrypournelle.com/slowchange/Strat.html
From Pournelle’s short disquisition on this book:
“For a while it was a textbook in all three Service Academies and remained so for several years at the Air Force Academy in Colorado Springs. It was also used at the Air War College in Alabama and the National War College, and it’s my understanding that Xerox copies are used (with our permission) in some classes at the war colleges to this day. “