There is no one single cause of alcohol addiction. Rather, a combination of genetic, environmental, and psychological factors may contribute to the development of alcohol addiction. Genetics may play a role, as some people may be more susceptible to addiction due to genetic factors. Environmental factors, such as growing up in a home where alcohol is abused, may also contribute to alcohol addiction. Psychological factors, such as stress, trauma, or mental health disorders, can also increase the risk of alcohol addiction. Additionally, excessive or prolonged alcohol use can lead to physical dependence, which can further perpetuate addiction.