Using drugs started in the early centuries. Smoking tobacco became popular after Christopher Columbus discovered the positive affects of smoking tobacco leaves. Alcohol was seen as a gift from God, and other drugs stemmed from thrill seekers trying different chemicals and natural substances for pleasure. When using drugs frequently a psychological and physical dependence occurs due to the pleasure and relief assoaciated with drug use. Drug use is most commonly started through peer pressure, model observation, and advertisement. The use of tobacco is commonly started in the early 20’s of an adult. There are a number of reasons why people may start to smoke tobacco. As a child growing up, children may see their parents or older siblings smoking cigarettes making them want to try it. As children grow into young adults, they are either pressured into smoking cigarettes or they see their favorite role models smoking cigaerretes. Teenagers usually view cigarettes as the cool thing to do and start becoming regular smoker in the early 20’s. At this age many people have higher risk factors such as having kids, not graduating from college, low paying jobs, or problems with their appearance. Although cigarettes may have a positive feeling as far as calming the person, or realiving stress, there are also negative factors. A persons health is damaged by cigarettes. The nicotine in the cigarette causes psychological and physical dependence making the person believe that smoking is ok when in fact it can cause heart and lung disease. Alcohol causes some of the same effects. Alcohol just like cigarettes cause a psychological and physical dependence because . Even though drinking too much can cause hangovers and illness people still engage in drinking. There are a number of reasons for drinking alcohol. Some people want to try alcohol because their family members or role models drink , or...