Deuteronomy 30 forms the end of a chiasm that began in Genesis 2. In the Garden God presented humanity with a choice between life and death. When we ate of the tree of knowledge of good and evil, we chose death for ourselves and our children. In Dt 30, we get a second chance at that choice. In this case Moses explicitly lays out the choice between blessing and curses and between life and death. He then gives us God's preferred solution - choose life - for yourself and for your children.