In the beginning when the Lord God made man he gave also to man dominion over the whole creation, over the animals, the plants, and the earth. So rather than ask the question of "why did God let mankind fall?" Which implies that God is at fault, it is more prudent to ask; "why did man listen to a being that was inferior to him, in fact a being that man was put in charge over?" This question is also answered. The reason man ate is because he loved the woman and did not know she had become possessed. The reason woman ate is because she was demon possessed by the serpent. This leaves the ultimate fault on Satan who not only became first murderer in doing this thing but also the father of lies by forging those three lies, which still are in his mouth until the end. God gave the breath of life, the spirit, to all things living, this is what makes something alive. What the serpent did in the Garden is very terrible! To make the first demons and the source of all demons he had to break and twist his own breath of life into three pieces and cast them into the woman's mind. For this reason, the serpent is cursed above all the other animals, he has no chance to ever be saved, no chance to ever repent, and the prophecy was given that the Lord Jesus will come and slay his army at the end and God will kill him and throw him away into the lake of fire to suffer torment forever and ever and even forever and ever, in Jesus name, the King and Savior born and risen and to come and reign forever, amen.