The flood has not solved the problems of humanity. All the bad people have been washed away. Good people were saved in the ark. But good and bad runs down the center of each person. Sin has effected every human being .
In the after math of babel humanity is scattered across the earth in disharmony. God then chooses Adam to be the founder of a new nation. The Lord said to Abraham "go from your country and your kindred and your father house to the land that I will show you. And I will make of you a great nation and I will bless you and make your name great so that you will be a blessing . I will bless those who bless you and him who curses you I will curse and In you all the families of the earth shall be blessed.