The origins of leavened bread

Charred remains interpreted as bread-like food have been recovered from sites predating the adoption of agriculture, which places some form of bread-making earlier than the older assumption that it followed farming.

That is a genuine and significant finding, and it is narrower than it is often reported to be. It tells us that ground plant material was made into a baked flatbread-like food. It does not tell us that it was leavened.

The familiar account — that a mixture was left out in ancient Egypt, caught wild yeast, rose, and was baked out of curiosity — is repeated everywhere as though it were established.

It is not. It is a plausible reconstruction of something that must have happened somehow, and there is no direct evidence for the specific incident. The reason it circulates so widely is that it is a good story with a satisfying shape, which is a poor reason to believe something.

What can be said is that Egyptian baking was sophisticated and well attested in the archaeological and pictorial record, and that leavened bread was clearly established there. How it began is not recoverable from that evidence.

The claim is recorded rather than omitted because a reader who has encountered it deserves to find out what its status is. Leaving it out means the only accounts available are the confident ones.

This is the general policy for the history section: traditional accounts are recorded AS traditional accounts, with the evidence tier stated on the page, rather than either repeated as fact or silently dropped.