About 10.000 years our ancestors made a huge leap forward. For thousands of years we had lived as hunter-gatherers - happily stuffing anything down our throats we could find. But this kind of lifestyle was harsh and food rather unpredictable.
By settling down and cultivating grasses like wheat all that changed. Compared to all other foods available at that time wheat or better say grain can be stored for year without going stale. Compared to collected veggies, fruit or meat that is a huge advantage.
And wheat can be used to produce more wheat. So a whole new production system developed around wheat. Humble dwelling developed into villages and cities. Additional land was transformed into farmland. Farming allowed longer and permanent settlement, since it made sense to use the same fertile fields again and again.
