A importância das galinhas

"... chickens appeared in the Mediterranean world sometime in the middle of the last millennium BC. Quick to breed and relatively easy to maintain, they provided eggs and a source of conveniently small quantities of meat—an important attribute in a world without refrigeration. The same is true in much of Africa today, where you will often see roadside signs advertising “live chickens” for sale."
O livro parece muito bom mesmo.