As people line up for their chance to buy legal marijuana, it marks the end of the criminalization of this drug. But how did pot end up being illegal in the first place? When did this happen and why have attitudes changed since then?\n\nIf you enjoy the\xa0This is Why\xa0podcast, please take a minute to rate it on\xa0Apple Podcasts\xa0or\xa0Google Podcasts, tell us what you think and please tell a friend about the show.\n\nTwitter:\xa0@thisiswhy\n\nEmail:\xa0thisiswhy@curiouscast.ca