Human Evolution and Cannabis: The Ultimate GiftCannabis was commonly used during the ancient civilisation period and has many global advocates including Bob Marley, Carl Sagan and even the 44th President of the United States, Barack Obama. However, by law, cannabis is illegal in most countries. The global ban started off when the First Commissioner of the Federal Bureau of Narcotics, Harry J. Anslinger, declared that marijuana should be illegal, as it is an addictive drug that causes insanity,