The Problem of the Damned goes like this; why did God create a world that will have people who will experience eternal damnation when He theoretically could’ve created a world in which there were no people who rejected Him and had free will, per His omnipotence, omniscience, and omnibenevolence?
My first answer was based on the idea of absolute contingency; no person exists in any other world except the world they are found in. For God to not create a world is for God to not create those beings in any other world, because they could only exist in that particular world.
My second answer is this; evil is a good because as it produces an evolving world. If there were no evil, there would be nothing for me to overcome, and so there would be nothing to strengthen my moral good, my moral resolve, my love for God, my unity with God, etc.
God is infinite, and everything created is finite. Nothing could be created infinite. Everything created then, no matter how “arbitrarily large” it was created is yet an infinite distance from God. This distance can only be bridged through growth. The growth will never produce an infinite, but this fact of growing produces the unity necessary for beings to resonate with the Absolute; to resonate with Life is to grow, to grow is to resonate with Life.
On the other hand, damnation is not an infinite loss, as one loses only what finite-life they have. They are bankrupt of growth, but they cannot “fall” farther away an infinite distance. Damnation places beings outside of any chance of harmony with the Absolute, and so places them outside the ability of this divine-like growth. Thus, they fall away from Absolute Being to non-being; however, the difference between non-being and a finite being is always only finite.
So, damnation is a finite loss while salvation is an infinite gain. The salvation of the saved weighs out the damnation of the damned in every instance.