The tribe of Koreish...
The tribe of Koreish, by fraud or force (sic), had acquired the custody of the Kaaba; the sacerdotal office devolved through four lineal descents to the grandfather of Mohammed; and the family of Hashemites, from whence he sprang, was the most respectable and sacred in the eyes of their country.
Mohammed's descent from Ismael was a national privilege or fable (sic); but if the first steps of the pedigree are dark and doubtful (sic), he could produce many generations of pure and genuine nobility; he sprang from the tribe of Koreish and the family of Hashim, the most illustrious of the Arabs, the princes of Mecca, and the hereditary guardians of the Kaaba. (The Decline and Fall of the Roman Empire) Hashim had a younger brother called Al-Muttalib, the son of Abd Manaf.
For a time, he was chief of the clan, and when he died, his nephew – Abdul Muttalib – the son of Hashim, succeeded him as the new chief. Abdul Muttalib exhibited all the qualities which had made the names of his father and grandfather great and famous. As noted before, the city of Makkah, like the rest of Arabia, was without a government and without a ruler, but it was dominated by the tribe of Quraysh. Quraysh was composed of twelve clans, and Banu Hashim was one of them.
Reacting to the depravity of the times, the members of Banu Hashim, were prompted, a half-century before the birth of Muhammad, to make some tentative efforts to arrest the moral decline of the Arabs and to improve the social, economic and intellectual climate of the country. They, therefore, forged the League of the Virtuous . The major aims of the League were to prevent wars from breaking out and to protect the weak and the defenseless from their enemies.
The Banu Hashim also interested itself in the economic welfare of the Arabs, and inaugurated a system of trade with neighboring countries by sending caravans to Syria in summer and to Yemen in winter, as noted before. These caravans left Makkah loaded with such products as date fruit, harness for horses and camels, blankets made from wool or camel hair; perfumes and aromatic herbs; spices, incense, hides and skins of the desert animals, and pedigreed horses.
They brought back with them textiles, olive oil, weapons, coffee, fruits and grain. Both the League of the Virtuous and the caravan trade were unquestionably great gifts of the Banu Hashim to the Arabs.