Quoted in the Huffington post, research done on rats indicates that Theory T is onto something when it comes to addiction. Rats in cages that could choose from either pure water or heroin – laced water go for the heroin one and become addicts and die. But not when they are in a luxury cage with others.
Loneliness its seems is the driver of addiction.
George Monbiot writing in the Guardian calls loneliness a disease.