It is important to find out whether Casey's anxiety and depression are due to her drinking problem or whether her drinking is causing her depression. According to our book, “A systems perspective is perhaps more useful for understanding human behavior than for directing social work interventions.” (Page 43). There are three types of situations that are more likely to produce problems in social functioning and they are the following: stressful life, transitions, relationship difficulties and environmental insensitivity. Casey falls into all three of these categories. Therefore a systems theory would help. According to this theory, family, couples and organizational members are directly involved in solving a problem, even if it is an individual issue. This is where her family and friends could come in and help her understand that although she is struggling, she can overcome this. They can focus on her positive attributes and strengths, including the fact that she graduated from college, was able to get an apartment, and held down a full-time job. Additionally, there was a time in Casey's life when she was able to decrease her alcohol consumption for a limited period of time. There's no reason why I can't try to do it again. If we look at the biopsychosocial model we can conclude that his biological, psychological and health