Editing Substance abuse (section)

===Value judgment===
[[File:Correlations between drugs usage.png|thumb|upright=1.4|right|This diagram depicts the correlations among the usage of 18 legal and illegal drugs: alcohol, amphetamines, amyl nitrite, benzodiazepines, cannabis, chocolate, cocaine, caffeine, crack, ecstasy, heroin, ketamine, legal highs, LSD, methadone, magic mushrooms (MMushrooms), nicotine and volatile substance abuse (VSA). Usage is defined as having used the drug at least once during years 2005–2015. The colored links between drugs indicate the correlations with {{math|{{pipe}}''r''{{pipe}}>0.4}}, where {{math|{{pipe}}''r''{{pipe}}}} is the [[absolute value]] of the [[Pearson correlation coefficient]].<ref name="Fehrman2015">{{Cite book |last1=Fehrman |first1=Elaine |last2=Muhammad |first2=Awaz K. |last3=Mirkes |first3=Evgeny M. |last4=Egan |first4=Vincent |last5=Gorban |first5=Alexander N. |title=Data Science |chapter=The Five Factor Model of Personality and Evaluation of Drug Consumption Risk |date=2017 |editor-last=Palumbo |editor-first=Francesco |editor2-last=Montanari |editor2-first=Angela |editor3-last=Vichi |editor3-first=Maurizio |chapter-url=http://link.springer.com/10.1007/978-3-319-55723-6_18 |series=Studies in Classification, Data Analysis, and Knowledge Organization |location=Cham |publisher=Springer International Publishing |pages=231–242 |arxiv=1506.06297 |doi=10.1007/978-3-319-55723-6_18 |isbn=978-3-319-55722-9|s2cid=45897076 }}</ref>]]
History professor [[Philip Jenkins]] suggests that there are two issues with the term "drug abuse". First, what constitutes a [[drug]] is debatable. For instance, [[Gamma-Hydroxybutyric acid|GHB]], a naturally occurring substance in the central nervous system is considered a drug, and is illegal in many countries, while [[nicotine]] is not officially considered a "drug" in most countries.

Second, the word "abuse" implies a recognized standard of use for any substance. Drinking an occasional glass of wine is considered acceptable in most [[Western Countries|Western countries]], while drinking several bottles is seen as abuse. Strict temperance advocates, who may or may not be religiously motivated, would see drinking even one glass as abuse.  Some groups (Mormons, as prescribed in [[Word of Wisdom#Tea and coffee|"the Word of Wisdom"]]) even condemn [[caffeine]] use in any quantity. Similarly, adopting the view that any (recreational) use of [[cannabis (drug)|cannabis]] or [[substituted amphetamine]]s constitutes drug abuse implies a decision made that the substance is harmful, even in minute quantities.<ref>{{Cite book |last=Jenkins |first=Philip |url=https://www.worldcat.org/oclc/45733635 |title=Synthetic Panics: The Symbolic Politics of Designer Drugs |date=1999 |publisher=[[New York University Press]] |isbn=978-0-8147-4244-0 |location=New York |pages=ix-x |oclc=45733635 |author-link=Philip Jenkins}}</ref> In the U.S., drugs have been legally classified into five categories; these are schedule I, II, III, IV, or V in the [[Controlled Substances Act]]. The drugs are classified on their deemed potential for abuse. 

The usage of some drugs is strongly correlated.<ref name = "FehrmanGorbanBook">{{cite book |last1= Fehrman|first1= Elaine|last2= Egan|first2=Vincent |last3= Gorban|first3= Alexander N. |last4= Levesley|first4= Jeremy |last5= Mirkes|first5= Evgeny M. |last6= Muhammad|first6=Awaz K. |date= 2019|title= Personality Traits and Drug Consumption. A Story Told by Data|doi = 10.1007/978-3-030-10442-9|publisher= Springer, Cham|isbn=978-3-030-10441-2 |arxiv= 2001.06520  |s2cid= 151160405}}</ref> For example, the consumption of seven illicit drugs (amphetamines, cannabis, cocaine, ecstasy, legal highs, LSD, and magic mushrooms) is correlated and the [[Pearson correlation coefficient]] ''r''>0.4 in every pair of them; consumption of cannabis  is strongly correlated (''r''>0.5) with the usage of nicotine (tobacco), heroin is correlated with cocaine (''r''>0.4) and methadone (''r''>0.45), and is strongly correlated with crack (''r''>0.5)<ref name = "FehrmanGorbanBook"/>