Most of what I said up there is shown in amazing detail in that series. Watch it. Phenomenal stuff.
seen it was cool but filled with conjecture just like what you botinist buddy said ... its all conjecture .
here is some more ... cannabis predates man by a few years and did fine without us one was saying ...
Cannabis is one of the few generic names that has become a common name in our culture, either as a subject of praise or damnation, because the plant produces hallucinogenic compounds. However, the original use of this plant in China was as a fiber plant, hemp. That usage now is documented back to 10,000 BP in Taiwan, where archaeologists have unearthed broken pieces of pottery having hemp fiber patterns and rod-shaped tools for retting the stems to obtain net fiber. The Chinese invented retting stems, thereby to obtain the soft fibers, which were used for fishing nets, clothing, shoes, sails, and, eventually, writing materials (oldest known rag paper 180 B.C.). Also, the fruits (achenes) were eaten, being rich in triglycerides (oils). Ethnobotanists have suggested that
Cannabis grew as a robust weed on rich, nitrogenous dump heaps, where villagers put the remains of fishes, and it grows well in alluvial soils with low clay content. This presumably led to the discovery of hemp as a fiber and a food plant, and to its deliberate cultivation by 4000 B.C.