I disagree with what Benoitsmidget says: "because God has given us free will." - which means without free will - there can be no good/evil which is the self-guarding guilty slave thinking - but the alternative is even much worse: 'I must believe in free will - I have to or I'll go suicidal"
In addition, all chaos says is that there is no way to prove human have free will. "Indeterminism does not confer freedom on us" - From https://hubpages.com/education/QuantumIn4
#1 - God cannot have free will. A benevolent god always chooses the path that causes most good so therefore has no real choice.
#2 - If God, angels and other beings in heaven have free will where there is no evil or suffering, then it cannot be true that god lets evil exist because it is a required side-effect of free will.
#3 - God did not make the Universe or there is no God