Opium is being consumed for at least 5000 years, and has only been banned (mostly) in the last 150 years. In the 19th century there were two opium wars between western powers and China because the latter banned the use and import of opium. So opium was definitely grandfathered and normalized not too long ago.
Opium is being consumed for at least 5000 years, and has only been banned (mostly) in the last 150 years. In the 19th century there were two opium wars between western powers and China because the latter banned the use and import of opium. So opium was definitely grandfathered and normalized not too long ago.