The mystical devotees to Shiva at the headwaters of the Brahmaputra have smoked Ganja as part of their religious ceremony since time immemorial. They stand there naked with their dreadlocks. Sorry I can't find the source but I read this somewhere & I'm not making this up.

China. http://www.roll-a-joint.com/marijuana-history.html

The bible explicitly states in genesis 1:29 that hemp was given to us by "god". Most of the bible and Christianity can be traced back directly to earlier sources including ancient Egypt and Sumeria. The Sumerians kept detailed and extensive records carved on clay tablets. What they have inscribed is the topic of much debate. They have the first known creation story. Theirs is the first known civilization. Common sense would dictate that it must have taken at least hundreds of years, leaving archaeological evidence and indeed records of the innumerable intermediate steps it must have taken to develop all of the various sciences that made civilization possible. The most relevant is cultivation. A few more are written language, mathematics, astronomy, astrology, record keeping, timekeeping, genealogy, the zodiac, and law. Every civilization on earth since (yes, including modern society) has had its foundations in knowledge that can be traced back to Sumeria. But there is no such evidence, fossilized or recorded. It's as if the Sumerians transformed from primitive hunter-gatherers into a the first human civilization without leaving the slightest footprint of such a gradual change. Well, thats impossible. They themselves Left records of what actually happened. According to a factual interpretation of their cuneiform tablets(which were not "myths" or "fantasies") they were given this knowledge by their "gods" whom they explicitly described as physical beings that were actually there, who came from above in mechanical vessels. There is proof in a tablet(from 6000 years ago) that actually depicts what can be nothing but our solar system. And many other examples of knowledge that they could not have possibly attained on their own. Among a list of gifts given to the sumerians(which found its way into genesis) were certain cultivatable plants and herbs, most notably wheat and hemp. If you try to trace cannabis back to its source, what you will find is that it has been growing wildly and cultivated all over the earth since time immemorial. Since sumeria has so many firsts, i'd tend to beleive them. Especially since it's the only record of marijuana not being there, then being there. So no. Cannabis did not come from India. The plant known as cannabis/marijuana/hemp/herb/ ganja/weed/grass/cheeba/sensi/pot/reefer/mary jane/ chronic/bud/buddage/mota/Bubblegoose rompy stomp/ nugz/cheef/ sticky icky/hippie's cabbage/ sess/shrubbery/tampee/Scooby Snacks and "doobrey" did not come from earth.

No U fool the names are ganja guam pot hash dope