Is this the best of all possible worlds?
Had God created a world in which He invested humans with adherence to inner, God designed morality guidance--wouldn't an obedient (and far better off human race) world not have been "better" than the one we are in?
Free Will is only the freedom to screw up.
Think about this.
Everything man designs is designed to function properly. Only through error does it malfunction. The human designer tries to foresee all contingencies which would test the perfect operation of his invention.
How would God not do the same?
If GOD COULD create the BEST of all possible worlds--is this world it?
Endowing humanity with the chaos based decision mechanism (we call Free Will) is not a boon to mankind's safe-keeping.
An inner guidance from morality (built in) would make man choose obedience because it is best and not because man had to weigh unknown values against known (which is what Adam did.)
Being deceived by any third party (such as the serpent in Eden) would be impossible!
The best of all possible worlds would contain humans designed with an internal guidance which exactly corresponded with what was best for humanity as programmed by the designer himself!
What flaw did Adam's guidance system have in its design? It depended entirely on blind obedience. Blind obedience is not a credit to the rational condition of human intelligence.
What am I saying?
By creating a brain for Adam that depended on rational thought---Adam's nature was to weigh skeptically his commands against his options!
Adam's decision to "be like God knowing good and bad" was a RATIONAL DECISION.
But, it was in his human nature to make this decision!
Demanding of any invention that it do what it is NOT DESIGNED TO DO is a failure of the designer.
Therefore: GOD DID NOT CREATE THE BEST OF ALL POSSIBLE WORLDS.