Peanut soup is considered a Southern delicacy, and dates back in America to the early 1700s.   Peanuts are thought to have been brought to America by Portuguese slave traders. Along with black-eyed peas and yams, peanuts were carried on slave ships to feed enslaved Africans during their passage to the New World.     Peanut soup itself is most certainly an adaptation of the peanut soups and stews brought from Africa.