Sadra's existential proof for reasoning the best creational system

Reasoning the best created system as an answer to the problem of evils, numerous the why proofs have been offered in Islamic and western philosophy. The existential proof for the best created system, however, is Sadra`s innovation. In the paper, Sadra`s proofhas been explained and argued against by some objections in such a manner that not replying them, his proof woul fail. The strongest objection in the formal aspect of the proof has been known as lacking the bases of an existential proof. And when regarding the content also we find the defect of lacking the necessary ability in human being to prove the system`s quality of being best in total regulation over it. The objection would become far strongest with regard to the whole creational universe. Finally, Lahiji andTabatabaei`s views have been critically examined.