January 29

Question: What will be the food of the united people?

‘Abdu’l-Baha’s Answer: As humanity progresses, meat will be used less and less, for the teeth of man are not carnivorous. For example, the lion is endowed with carnivorous teeth which are intended for meat and if meat be not found, the lion starves. The lion cannot graze; its teeth are of different shape. The formation of the lion's stomach is such that it cannot receive nourishment save through meat. The eagle has a crooked beak; the lower part shorter than the upper. Were it to try to pick up grain it would find it impossible; were it to try to graze, it would fail. Therefore it is compelled to partake of meat. But the domestic animals, the cow, horse, donkey, sheep, etc. have herbivorous teeth formed to eat grass which is their fodder. The human teeth, the molars, are formed to grind grain. The front teeth, the incisors, are for fruits, etc. It is therefore quite apparent, according to the implements for eating, man's food is intended to be grain and not meat. When mankind is more fully developed the eating of meat will gradually cease. 
(‘Abdu’l-Baha, Questions and Answers following ‘Abdu’l-Baha’s Talk at Church of the Ascension, New York, June 2, 1912; Star of the West, vol. 3, no. 10, September 8, 1912)