R. David Kasher on Parashat Vayishlah: Red Alerts

The Torah often employs a “bookending” technique, using similar words or phrases in both the first and last verses of the parashah, in order to create a thematic frame for the action in the middle.  Parashat Vayishlah’s bookends are especially pronounced, in that its first and last verses each end with the same word: “אדום - Edom.” What is the significance of this bookend and what can it teach us about the relationship between Ya'akov and Esav?