It seems as if that the flood event (note I use the word EVENT and not story since the flood happened. It is not a story like Cinderella or Treasure Island) - the flood event seems to have something to do with us being given the awesome right to choose freely, freedom of choice. I ask why did God do this? It seems such a dangerous thing to do, to allow us, us humans, to be able to decide for ourselves between one thing and another.
The rabbis refer to this freedom of choice as יֵצֶר הַרַע or Yehtzer HARA, the evil inclination and יֵצֶר טוֹב or Yehtzer TOV, the good inclination. In Gen. 6:5 it seems that all of mankind was prone to choosing evil continually or their יֵצֶר הַרַע Yehtzer HARA, the evil inclination, was stronger than their יֵצֶר טוֹב or Yehtzer TOV, the good inclination. But, God gave us this freedom of choice and, right from the "get go," we chose poorly.
So, is the purpose of flood related to all this? Is it related to the overpowering leaning we have to choose evil and sin? God said He would blot out all mankind since He was sorry He had made them. So, the flood "cleansed" the earth of all wicked evil men, those whose יֵצֶר הַרַע Yehtzer RA, the evil inclination, was stronger than their יֵצֶר טוֹב or Yehtzer TOV, the good inclination. But, wait a minute. God also came to cleanse humankind again. He came and died for us and by 1 John 1:7 His blood cleansed us from all sin! But, it is not given unless we use our יֵצֶר טוֹב or Yehtzer TOV, the good inclination to choose Christ, the Messiah.
Hmmm. Are these events connected? Is God trying to teach us something much more awesome than if the flood happened or if it was worldwide or local. It seems the answer is YES.
Rev. Ferret - who is this guy? What's his background? Why should I listen to him? Check his background at this link - click here for the teacher's background