the doctrines of the church blind people to another possible answer. there was something here besides man when man was created . if you look in the tree of ? you will find a serpant.  the reason the earth was made was to cast by whatever name you want to use for it. out of heaven due to his rebellion against god. the what ever you want to call it was able to do everthing god could do but create. to continue his lineage he beguiled eve and his lineage was continued. just look at eves punishment. i will put emitty between your seed and his. because jewish tradition in the beginning of written text didnt list female in the listing. where do you think the cities came from that cain found his wife. where did the cities come from period. the fallen ones had already built them. our job was to subdue the ones he had cast from heaven. but instead we became as one of them. thats why god ran man from the garden god said that man had now become as gods. so he wouldnt let man eat of the tree of everlasting life.