England And China: The Opium Wars, 1839-60
As Great Britian imported Opium into China, an estimated 12 million Chinese men became addicted to Opium. This caused for production as well as stardard of living to go down. China then made laws against Opium and this caused conflict between Great Britain and China. Thus forth leading to the Opium Wars.
Allingham, Philip V. England and China: The Opium Wars, 1839-60, 26 June 2006, www.victorianweb.org/history/empire/opiumwars/opiumwars1.html.