Does alcoholism have a hereditary component?

Does alcoholism have a hereditary component?

Gail Priddy (Deputy Director) gives expert video advice on: What is alcoholism?; What is the difference between being an alcoholic and just drinking a lot?; Is alcoholism a disease? and more...

There have been twin studies done in Sweden, where twins who came from families who have had alcohol problems were adopted elsewhere, but were more likely than the control group they used to develop alcohol problems. But I think that there are lots of other reasons that people are more likely to develop alcohol problems than the notion of heredity.