These individuals have decided to stop drinking because they have come to understand that "alcohol is controlling their lives."
I have to admit, like every single reading that precedes this, our analysis begins when the individual is already in the community. When we say "they have come to understand that 'alcohol is controlling their lives'", there seems to be a lot of learning that has already happened. Similarly, all the other cases we have addressed study how the individual interacts in the community of practice, but say nothing about how they got there. To me, that is a fundamental question which we have so far not really devoted any attention to.