Based on what I have recently learned (over the past 6mo or so) regarding grain consumption within modern day factory or industrial farming societies, and its adverse effects on human health ultimately leading to many of the illnesses and diseases affecting Americans in epic proportions, I have changed my stance on the importance of such monocrops (grains and legumes) within a healthy human diet.
The human digestive system was not designed nor has it evolved to a point to effectively digest such foods like grains and legumes without the body suffering from its harmful side effects; inflammation and damage to the gut. Since evidence shows inefficient digestion and inflammation are the root cause for nearly all human diseases be it heart disease, diabetes, cancer, crohn's disease, autoimmune diseases, and chronic inflammatory disorders in all its forms, a healthy diet should promote a healthy gut (fermented foods) and be anti-inflammatory based (grass-fed meats and eggs, wild caught fish, fresh organic fruits and vegetables, nuts and seeds) instead of high in foods promoting inflammation such as grains, legumes, and factory farmed meats, poultry, fish, and eggs.
I believe that if consumed, grains and legumes should be eaten in minimal quantities and preferably in fermented form. (this is my opinion)