The hunting-gathering tribes took to harvesting and eating these seeds. But they didn't have to worry about planting emmer, because it sowed itself. Then a remarkable thing happened. This mutation yielded something very close to our modern wheat, with its much plumper grain. It may have happened many times before that, but if it did we'd have no way of knowing, because wheat doesn't blow in the wind, and it can't sow itself.
Modern wheat survives only in a symbiotic relationship with humans.
Without someone to harvest it and plant it, it dies away. But somehow some very clever person spotted one of these mutations of emmer and recognized the potential of collecting and manually replanting the seeds. A hunter-gatherer conceived of farming. This was the prototypical act of a kind of technological creativity that's gone on ever since. That person saw how to cast what was evident into a new arrangement and to gain a result that was not evident at all.