A strapless tefillin cannot be worn. It is only in the succah that the Lord tolerates imperfection. And this is why, says Rav Kook, we connect the succah with peace. Because peace can never exist if we insist on perfection. In the grave there is perfect peace, but in this world there is a big shortage of perfect people and therefore we can only get along if we are willing to sit in the same succah, despite its imperfections, and despite our imperfections.
Peace requires accepting that the other side is far from perfect.
The word for domestic tranquility in Hebrew is Shalom bayit. A house can only have peace if everyone living within it accepts the fact that everyone living under that roof is not perfect. Similarly peace between countries can only come about with the realization that the peace is going to be with imperfect partners, at best. That one must be prepared to settle for an imperfect peace. Israel does not have a perfect peace with Egypt.