Africa is at once the most romantic and the most tragic of continents. Its very names reveal its mystery and wide-reaching influence. It is the "Ethiopia" of the Greek, the "Kush" and "Punt" of the Egyptian, and the Arabian "Land of the Blacks." To modern Europe it is the "Dark Continent" and "Land of Contrasts"; in literature it is the seat of the Sphinx and the lotus eaters, the home of the dwarfs, gnomes, and pixies, and the refuge of the gods; in commerce it is the slave mart and the source of ivory, ebony, rubber, gold, and diamonds. What other continent can rival in interest this Ancient of Days? There are those, nevertheless, who would write universal history and leave out Africa. But how, asks Ratzel, can one leave out the land of Egypt and Carthage? and Frobenius declares that in future Africa must more and more be regarded as an integral part of the great movement of world history.