Bread is grain and liquid, and (typically) involves fermentation.
Beer is grain and liquid, and involves fermentation.
So they are, one could poetically/romantically/pseudo-scientifically say, the same thing. They're also two of the oldest foodstuffs in the history of man. Pretty much every culture has their version of each.
Cheers.
| Brioche in two shapes: a tete ("head") and couronne ("crown") |