title: Speculations concerning opium abuse and world history.
mesh_terms: D001083:Arabia; D002681:China; D004534:Egypt; D006115:Greece; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D049691:History, Medieval; D006801:Humans; D007492:Iran; D007557:Israel; D007558:Italy; D009892:Opium / Q000266:history*; D019966:Substance-Related Disorders / Q000266:history*; D013593:Syria; D014481:United States
chemical_list: D009892:Opium