The War on Drugs that happens in many countries is, in fact, a result of that; specifically, its a result of (1) the War on Drugs in the US being a direct result of those things, and (2) the War on Drugs implemented in many other countries being a direct outgrowth of the exportation of the US War on Drugs through US foreign policy. (Ironically, this is true even of international treaties that foreign governments are now accusing the US of violating due to marijuana legalization efforts in some states.)
My point was that a lot of the countries where there may not be direct domestic parallels to the US motivations still have a War on Drugs as a product of the same motivations because they do so as a result of US pressure.
Few European countries have police as militarized or jails as full as yours, but many of them eat up the same war on drugs rhetoric.
This is a reference to a period in Chinese history when the entire nation suffered from a crippling opium addiction. The opium was introduced by the British, in an effort to address trade imbalances.