Substance related disorders

For this final paper project I choose a very interesting topic known as a Substance-Related Disorders. In one word for some people using alcohol, smoking cigarettes or other drugs is apparently a harmless pleasure. For others it is extremely destructive for their health. The main point why I choose this topic is my own addiction to cigarettes. For long time I have tried a lots of different things to quit this nasty habit, but nothing worked for me so far. I think of cigarettes as a type of drug along with heroin and cocaine that we people develop addiction to. I do have one question is what really causes any drug use to develop into an overwhelming addiction that dominates your life in any possible way. I believe that everyone wants to be in control over its own life, but when you are addicted to a drug you last that control. According to our text book addiction is defined as a difficult or impossible to quit habit. (Introduction to Psychology, James W. Kalat.6th edition.2002)....