GEN584 When God told Abraham that He intended to destroy the wicked city of Sodom, Abraham repeatedly argued and pleaded with Him not to do so Genesis 18:16-32.  However, when God told Noah that He was planning to destroy humankind, and that Noah should build an ark for himself and his family, Noah neither argued with God nor warned his fellow humans to repent.  Instead, he built the ark and seems to have said northing to others about why he was doing so Genesis 6:11-7:10. Abraham, in short, spoke to God on behalf of others; Noah, it would seem, did not.  TELVOL 1:45