Israel was the one who discovered THC and how it reacts with your body. They have been only using it for the last 6,000 years as they Scythans were first to use it and trade with Isreal.  It was the great fragrant cane in which King Solomon traded with the Queen of Sheba. 

Follow the link below fore more info. 

http://www.attn.stfi.re/stories/13376/how-israel-and-us-compare-marijuana-research?sf=vwnpjgk#aa