http://revach.net/article.php?id=4213

Section: Parshas HaShavua   Category: Life Lessons
Parshas Vayeishev: Rav Shloime Volbe - Stories Of Tzaddikim
Parshas Vayeishev is the beginning of a four parsha long story of Yaakov and his children.  Rashi brings the Medrash which compares this to the very brief history given at the end of Parshas Vayishlach about Eisav and how he settled his land in Sai'ir.  That which is Chashuv says the Medrash gets a great deal of attention while the rest is shortened.  This is similar to the ten generations between Adam and Noach, says the Medrash, which are greatly condensed as the generations fly by with the mere mention of the link in the mesora and nothing else.  That is until we get o Noach who has a whole parsha dedicated to him.

Rav Volbe says and astounding thing.  We see from this Medrash that the Torah does not talk about the Mabul to tell us the story of which coincidentally Noach played a starring role.  On the contrary, the only reason the Torah pays any attention to the Mabul was because it was the major part of the life story of the tzaddik Noach.

Maybe we can find a further illustration of Rav Volbe's point in the fact that we know there was a major flood that wiped out one-third of he world in the days of Enosh, yet not one word about it is mentioned anywhere in the Torah.