The Jews are the most tenacious people in history. Hebron is there to prove it. It ties 20 miles south of Jerusalem, 3,000 feet up in the Judaean hills. There, in the Cave of Machpelah, are the Tombs of the Patriarchs. According to ancient tradition, one sepulcher, itself of great antiquity, contains the mortal remains of Abraham, founder of the Jewish religion and ancestor of the Jewish race. Paired with his tomb is that of his wife Sarah. Within the building are the twin tombs of his son Isaac and his wife Rebecca. Across the inner courtyard is another pair of tombs, of Abraham's grandson Jacob and his wife Leah. Just outside the building is the tomb of their son Joseph. This is where the 4,000-year history of the Jews, in so far as it can be anchored in time and place, began.