"I esteem DeLong's writings very highly, have learned much from them, and think he is on balance very much a force for good, but there are times when I simply cannot understand how his mind works, and do not particularly want to..." --Cosma Shalizi
"Early agriculturalists" means Fertile Crescent ca. 5000 BC; "advanced agriculturalists" means northwest Europe ca. 1400; "industrial" means northwest Europe ca. 1860; "technological" means North Atlantic ca. 1970.