About 12,000 years ago in a place known today as The Fertile Crescent agriculture was born. We know from the archaeological record that the (likely) first grain to be domesticated and farmed was wheat. The Fertile Crescent includes parts of the following modern day countries: Iraq, Syria, Lebanon, Jordan, Israel, and Egypt. It’s is shaped a little like a crescent moon- hence the name.
A particular type of wheat grows wild in the region of the world- it’s einkorn. Einkorn was the wheat that was first picked from the wild and domesticated all those thousands of years ago. Over the centuries that have since passed humans have modified and cross bred with other grasses; einkorn and other early forms of wheat (emmer and spelt). What we are left with today is modern wheat- which is actually very different from ancient einkorn.