How Beer Saved The World
Many scientists and anthropologists now believe that it was not the desire for bread that kick-started the agricultural revolution that ended hunter-gathering 9,000 years ago; it was the yearning for barley to make beer. This led to inventions such as the plough, the wheel, irrigation, mathematics and even led to writing! This cascade of world-changing innovations was brought about by the desire for beer.
In ancient Eygypt workers were paid in beer so we could say that we wouldn't have had the Pyramids without beer. There are those who claim it is one of the major food groups because of it's nutritional content.
In modern times it played an important role in refrigeration, the discovery of germ theory and modern medicine.
However, in Medieval times when water was too dirty to drink, possibly it's most important function was to support the population. Beer was safe to drink and men, women and children drank it morning to night, certainly in England.
That possibly is still the case in some parts! Cheers.