Wheat is the second most commonly cultivated grain on earth - and it's used for everything from alcohol production to our humble loaf of bread.
The wheat we grow today has its origins in the middle east emmer wheat, which has been shown to have been cultivated for over 10,000 years.
Like all things agricultural, wheat has been constantly hybridised and refined to produce countless varieties, suitable for many different geographical regions and uses over the centuries.
Today's wheats are high yielding, and designed for quite specific soil types. In some ways, they are a triumph of agricultural method - after all, we have about seven billion people to feed on this little planet, and quite frankly we couldn't do it without the millenia of practice that has gone into the production of wheat.
There has been quite a lot of talk lately about wheat free diets and so on - which is fine for the first world - and not taking into account the nutritional benefits of sourdough bread - but in the end, wheat is the grain we have developed for possibly ten millenia to feed an ever growing population. Sure, we may be using too much wheat in our diet, but compared to other grains (like rice), wheat is definitely more sustainable. You think not? I suspect your definition of 'sustainable' may be different to mine. Wheat, in one form or another, has been cultivated by humans as an integral part of our diet for almost as long as we have walked the earth.