Who is an Arab?

Over a hundred million people in the world call themselves Arabs. That is, to say the least, a potential force in world politics, quite apart from the question of oil. Yet many observers are inclined to doubt whether there is any reality underlying the common use of the term Arab, And it is indeed not easy to define what is meant by an Arab.The Arabs are not a distinct ethnic group, since there are both white Arabs and black Arabs. Some of the black Sudanese Arabs claim descent in the male line from Arabs of Mohammed's time, and may well be correct in their claim. Nor is language a sufficient criterion of Arabness, since there are many Arabic-speaking Jews who are not normally called Arabs.