Basically, there are three types of any equilibrium: (a) Stable Equilibrium: There is stable equilibrium, when the object concerned, after having been disturbed, tends to resume its original position. Thus, in the case of a stable equilibrium, there is a tendency for the object to revert to the old position.
The modern disease theory of alcoholism states that problem drinking is sometimes caused by a disease of the brain, characterized by altered brain structure and function. The American Medical Association (AMA) declared that alcoholism was an illness in 1956.
Alcoholism is a specific type of addiction. There is no one single cause of alcohol addiction. Instead, there are multiple causes that can be grouped into four basic categories. These four categories are: biological causes, psychological causes, socio-cultural causes, and spiritual causes. Psychologists call this the Bio-Psycho-Social-Spiritual Model of addiction.