What is it?
The cosmic conflict theodicy is raised by Peckham in his book the theodicy of love which can be purchased here.
How does it work?
The cosmic conflict theodicy states that angelic beings with free will are the cause of a lot of the suffering in the world. Instead of blaming God for all the natural or moral evil, one can appeal to the existence of these angelic beings and their freedoms to solve the problem of evil.
Is it effective?
This theodicy is quite effective as it demonstrates that God is not responsible for the evil in the world. Rather, it is the existence of supernatural entities like angels and demons which meddle with the natural world.
For more information:
Make sure you go buy the book and also check out my youtube video where I discuss it in more depth. You can find the video here.