Fircoon introduced the class system. This is mentioned in the Qur'an. The story of Bani Israel and other monetheistic nations who rose to power and their sudden demise. The stories of the people of Sodom and Gomorrah. Allah swt mentions all these groups. The Qur'an is very deep
Where in the Quran does it say that Firaun was the first to establish a class system ?