Ow far did the Anti-Saloon League contribute to prohibition becoming active in the USA in the 1920s?

Background information peoples view on drinking in the USA before etc)

What happened prior to make people first interested in the Anti-Saloon League?
Other factors that may have affected the public and decisions made.
Arguments and counter arguments (was it just the League that contributed to prohibition, would it have happened without the League?)

Conclusion the main points and desisions come to, mainly answer the titile question How far did the Anti-Saloon League contribute to prohibition becoming active in the USA in the 1920s?”.
Back-up conclusion.
Harvard style referencing.
Please refer to sources e.g books or articles etc.