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In page Alcoholics Anonymous:

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AA traces its origins to a 1935 meeting between Bill Wilson (commonly referred to as Bill W.) and Dr. Bob Smith (Dr. Bob), two individuals seeking to address their shared struggles with alcoholism. Their collaboration, influenced by the Christian revivalist Oxford Group, evolved into a mutual support group that eventually became AA. In 1939, the fellowship published Alcoholics Anonymous: The Story of How More than One Hundred Men Have Recovered from Alcoholism, colloquially known as the "Big Book." This publication introduced the twelve-step program and provided the basis for the organization's name. Later editions of the book expanded its subtitle to reflect the inclusion of "Thousands of Men and Women."[citation needed]