However, in the 20th century, cannabis became heavily regulated and criminalized in many parts of the world, primarily due to its association with the psychoactive effects of THC. This marked the beginning of the “war on drugs,” which shaped modern perceptions and legal policies regarding cannabis. https://www.diigo.com/item/note/9nqe4/onph?k=3cc33f9835702cdb9872aef2620c81fe