Medieval European sources accurately describe Mecca’s merchant society

Evidence

Muhammad’s youth spent among merchant travellers was more widely recounted; in the reprobatio his acting as agent for Khadijah is clearly told. San Pedro’s more lucid picture of Meccan society in general included abi Bakr, ‘a merchant, as all the rest of the inhabitants of Mecca were merchants’; to him the others would listen, because he knew their ways. — Norman Daniel, Islam and the West, 459