We don't have a section in our FAQ (yet, I'm about to make it), but perhaps these previous topics will answer your question.
When did water replace beer as the staple drink?
If beer was the standard drink in Northern Europe during the medieval to early modern era, how did people cope with the stonking hangover every morning?
I once heard it said that beer is partially responsible for the survival of early civilization. Is this true?
What factors made beer so important to the establishment of civilisation? What made it a more practical drink than plane water?
Do we drink substantialy more water then our ancestors?