100,000 genes. Henceforth, the invention of gene mapping, which shows that often there are a number of different genes responsible for behaviours, related to alcoholism. As a group these are referred to as QTLs (quantitative trait loci). Moreover, understanding how they all fit together and more specifically how they influence behaviour of alcoholics is a subject of a great deal of long term research (Vaillant, 1995). Clearly, alcoholism is a complex phenomenon and it is most likely that all physiological, environmental, psychological, and genetic factors equally influence the cause of the disease. We live extraordinarily complex lives and we are acted upon by a multitude of variables affecting all aspects of our activities, henceforth, it would appear nonsensical to suggest that a single factor can cause a problem such as alcoholism....
