[iamsohungry]

Yes, I agree, I'm glad that people of the past sacrificed their dental health to build civilization to where it is now.

However, that's completely irrelevant to our food choices today. Modern agriculture is quite capable of producing foods which are more similar to foods we subsisted upon pre-agriculture. On an individual level, there's no reason for us to choose to eat grains. I suppose if everyone in society decided all at once to stop eating grains, it would cause problems, but that's unlikely; I think if society slowly shifts toward eating fewer grains, modern agriculture will be capable of adapting.