I believe that if you have alcoholic history in the family that it is not necessarily the cause of your own addiction, but yes, it does predisposition you toward that tendency. I would say a tad of genetics, but more behavior development. I come from relatives that are alcoholic, my brothers both are, and me, though neither of my parents are. I developed this theory when I was young and I mean I was pretty young to figure it out, in my family it skips a generation so far. Though with my kids and their cousins, my theory may be squashed.
I tried to figure out the why's for so long, that the why's became another excuse to drink, so like Carol said it's about recovery now. I may never get my answers.