Agriculture, not just of grains, facilitated the development of civilization, but that does not mean ipso facto that grains are good. Grains do in fact fatten people easily, and artificially, meaning not as nature/evolution intended. So, for a starving people grains have a roll, but most westerners are in the gone-too-far stage of the grain-based diet and food development. Walk through a supermarket and see how many foods you can find that do not have some form of grain in them, and you can understand that we have pushed the boundaries way past a bowl of porridge for breakfast. Humans and the animals most humans eat are artificially being fattened primariy on corn/soy products. PB is about recogonizing what we evolved to eat and getting our bodies back to a more natural way of eating, especially since this heavily grain-based diet leads directly to most of the diseases of moderity. The Golden Mean of any grain advantage to humans probably happened six hundred or more years ago. In short, if you do only eat a bowl of porridge a day, then you might be okay, but that is virtually impossible for the average person shopping in the typical food market.
This time, like all times, is a very good one, if we but know what to do with it. Ralph Waldo Emerson
Any given day you are surrounded by 10,000 idiots. Lao Tsu, founder of Taoism