Authors:

Drug misuse is not a disease, it is a decision, like the decision to step out in front of a moving car. You would call that not a disease but an error in judgment. When a bunch of people begin to do it, it is a social error, a life-style. In this particular life-style the motto is "Be happy now because tomorrow you are dying," but the dying begins almost at once, and the happiness is a memory.

Philip K. Dick (2011). “A Scanner Darkly”, p.287, Houghton Mifflin Harcourt
Drug misuse is not a disease, it is a decision, like the decision to step out in front of a moving car. You would call that not a disease but an error in judgment. When a bunch of people begin to do it, it is a social