<Very impressive knowledge of the ancient units, you have been doing this stuff a long time. also good reasons for teaching these ancient systems.>
Thanks for that compliment, but it's kind of hard to teach a subject you're still in the process of learning yourself. :) I've only made some significant discoveries in the past couple of years, that explains the how and why certain ancient culture's linear measurement ratios to other culture's exist. It's one thing for someone like John Neal to cite the ratio of an Assyrian Ft. to an Imperial Ft. as 21/20, and another thing entirely to explain why and how this came about. It can't be done through simple linear measurement analysis. Measurement systems arose out of the necessities of agricultural societies' transition from hunter gatherer social systems. This transition required a lot more forethought and planning than before. Megalithic sites arose throughout much of Europe during this transition phase, as one of those necessities was accurate timing of the yearly growth cycle of food grain production. This was much more critical in Northern latitudes than in Southern latitudes, due the the shorter growing cycle period. Which explains why most of these sites exist in Northern Europe. Not that the knowledge obtained wasn't passed around to Southern civilizations we've come to regard as the cradles of civilizations such as Sumer and Egypt. But I don't think these original measurement systems began in those civilizations either. Their metrologic systems appear ready made from the beginning of them, with no signs of an evolutionary progression to observe in warmer climate regions. However, it is easier than before for me to see some of the evolutionary progressions made after these earliest recorded history civilizations transformed into later dynastic cultures.
All of the basic fundamental necessities of early civilizations, including domestication of animals for transport of heavy burdens in addition to food, as well as hybridization of cereal grains began long before any recorded history of their evolutionary process. What we regard as organized societies living collective yet specialized professions could only come about by means of good measurement systems for barter and trade purposes long before the advent of mediums of exchange such as coinage evolved. One thing I do know, is that what we call the Imperial Metric system, and Megalithic Metric systems, are co-joined at the Vesica hip, in this evolutionary prerecorded history process.
That has been my main study focus these past few years. But now and then I like to get on a tangent to explore ideas that perhaps some of these long forgotten predecessors of recorded history civilizations we tend to focus more of our attention on, may have gotten some specialized assistance along the way from higher intelligent beings than those earlier hunter gatherer cultures possessed. Because some of those early Megalithic sites show signs of rocket science precision metrologic engineering to me and quite a few others around here too I think. :)