"Archeological evidence shows that grain porridges have nourished humankind since prehistoric times. Today, cereal grains still represent the world's major calorie and protein source, accounting for over half of the average per-capita intake of calories and nearly half of the per-capita intake of pritein. In the last 100 years in many Western countries, part of the grain calories has come not only from porridge, bread and other forms of cereal products, but also from ready-to-eat breakfast cereals." (Quoted from paper)