Regarding animals, you mentioned that the unpleasant appearance of some of them—for example, cockroaches—may be due to deeds they committed, or choices they made, in previous realms.
In biology and related fields, we say that every creature has a role in the world and that none is pointless. Even harmful or repulsive creatures play a part; if, for instance, one of them were removed, the balance of nature would be disrupted. If we extend this idea to all of God’s creation—for example, to the hosts of reason and ignorance, or even to Iblis himself and, more generally, to things that are evil or negative—were these roles assigned to them after their disobedience and rebellion, or were they there from the beginning? Could the world exist without evils of any kind? Since these beings also have a role, did God intend that role for them so that they would not be pointless and could have a relationship with other beings? Or was creation founded from the outset on a dual system of good and evil? If all creatures were good, how would they relate to one another?
Another question: there is a hierarchy among created beings, and people differ in both material and spiritual terms, forming different levels. The same is true of animals and other creatures. Is this hierarchy necessary for life, and is the world structured around it? If one day these hierarchies disappeared in every respect, would the world itself come to an end? After all, the Qur’an says that you were once one community, but then you differed…
Are some differences and disagreements natural and built into creation, while others arise from human error? Since differences of rank also exist among the Imams, it seems that this is part of the order of things. I can’t quite reconcile these points. Please guide me.