Social networks play a major role for the development and the maintenance of drinking behavior, and several studies have focused on the social role of alcohol. Yet, no studies have focused on the possibility of intervening directly into social networks as a prevention strategy. This paper presents the method, findings, and perspectives of a project ain-Ling at preventing alcohol-related problems through intervention in social networks. Based on systems theory and strategies developed within this framework, interventions in social networks of social drinkers were carried through. Essential to this approach was to take the starting point in each individual's own experiences with drinking situations in order to develop personal strategies for coping with drinking in a variety of situations. The findings are promising in terms of developing such strategies. The effects of the interventions were particularly obvious with the individuals reporting the highest level of consumption prior to the project.Social networks play a major role for the development and the maintenance of drinking behavior, and several studies have focused on the social role of alcohol. Yet, no studies have focused on the possibility of intervening directly into social networks as a prevention strategy. This paper presents the method, findings, and perspectives of a project ain-Ling at preventing alcohol-reIated problems through intervention in social networks. Based on systems theory and strategies developed within this framework, interventions in social networks of social drinkers were carried through. Essential to this approach was to take the starting point in each individual's own experiences with drinking situations in order to develop personal strategies for coping with drinking in a variety of situations. The findings are promising in terms of developing such strategies. The effects of the interventions were particularly obvious with the individuals reporting the highest level of consumption prior to the project.