Anyhow...
Anyhow, this does not mean that material and intellectual conditions do not affect each other. What is denied is their being infrastructure and superstructure respectively. Otherwise the Holy Qur'an itself says: "Surely man is rebellious when he thinks that he is independent." (Surah 'Alaq, 96:6 - 7) The Holy Qur'an accepts that the rich and the powerful play a special role in opposing the Prophets whereas the downtrodden and the underprivileged play their role in supporting them.
But because of their human nature, they all are capable of accepting the truth. From spiritual point of view the only difference is that one group in spite of its human nature, has to cross a great barrier before it may be persuaded to accept the truth for it has to relinquish its existing material gains and unjust distinctions, whereas the other group has no such obstacles. In the words of Salman, (the distinguished companion of the Holy Prophet) those who have a light burden are saved.
Not only that, but the latter group has a positive incentive. Consequent to its accepting the truth its living conditions improve and its life becomes easier. That is why the majority of the followers of the Prophets has consisted of the underprivileged. Anyhow, the Prophets have always been able to recruit some of their followers from the privileged classes and have been able to persuade them to fight against their own class and its class interests.
The Holy Qur'an does not think that the Fara'ina and the Abu Sufyans defended the polytheistic system of their times and provoked the religious sentiments of their people against Prophet Musa and the Last Prophet simply because they on account of their class position could not think of doing otherwise or because their class requirements had crystallized in the form of polytheistic beliefs. The Holy Qur'an maintains that they were perfidious.
By virtue of their Divine innate nature they believed in Allah and realized the truth, but still they rejected it and opposed it. The Holy Qur'an says: "They denied Our signs, though their souls acknowledged them." (Surah an-Naml, 27:14) The Holy Qur'an describes their disbelief as the denial of what their hearts believed. In other words, their denial was a sort of revolution against their own conscience. In this connection there exists a great misunderstanding.
Some people maintain that the Holy Qur'an endorses the Marxist theory of historical materialism.