When we see the plight of the 'muslim' world, it can sometimes inspire some to do something when they learn what was achieved by the past. It is no different to reading past old poetry, Iqbal included, or Qur'an exegesis by past scholars, whatever their capacities.
The Qur'an is replete with "have you not seen the state of past nations...", those who destroyed themselves should show us how and why they did this so we should avoid the same result, but looking at what great people and nations did before can also benefit us.
Have you not seen what your ancestors did? Looked for His Signs in the universe and within themselves?