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Bread for the rich was made from wheat flour, if you weren't wealthy then it was barley, and if you were poor, it was sorghum.

 

It wasn't until the 1800's that yeast was identifired as a plant-like organism. Yeast converts carbohydrates into alcohol, producing carbon dioxide in the process, which is a leavening gas.

 

If your going to eat bread, then eat wheat. Wheat is primarily made up of complex carbohydrates that provide a source of time-released energy.

 

The worst bread for you is white bread, which I like the best...

 

Out in Kuwait you'd see long queues of men and (horrors!) women, nasty giggly things, outside what looked like huge domed ants' nests. There was an arch in the bottom, the attendants would spin a pancake in their hads, reach inside the furnace, slap the pancake against the wall, pull it out, and drop it on a pile. No hand protection, just a toadstool shaped pad on a stick to clamp the pancake against the wall. 

These would be pulled out and dropped onto a pile. Kuwaitis would buy a pile of about 20. 1 would do me. By morning they were dried out and useless. Lovely wrapped round meat, or houmous. I suppose much the same as your tortillas.

I don't know who baked the first loaf of bread, but I know the first city to wrap bread was San Antonio...  likely it was the dust from the cattle drives that made it the only city that needed to.