It's the response from modal realism.
A thread:
1. Why did God make this version of the world?
2. Why doesn't God make a better version of the world?
It's question #2 that really bothers people, since if we were omnipotent we would make life better.
The universe that we observe around us is not evidence against the existence of better versions of reality – ones with, e.g., less suffering.
Because, on balance, its existence is good.
The set of all worlds that exist would be worse if our version of reality were not included.
He curates the set of possible worlds by only giving existence to the versions of reality that contain more good than evil.
And the set of "net good" worlds includes the universe you find yourself in right now.
Because then it wouldn't be *our* world.
It would be a *different*, better version of reality.
Should God create that better version? Yes.
Does it follow that our inferior version should never have been created? No.
This turns out to be its greatest advantage.
Other theodicies tend to prove too much, since there is no limit to the quantity of observed evil they can rationalize.
That makes it compatible with the teaching that we can come to know the character of God by observing creation. (Romans 1:19-20)