I was thinking about how Grade School is initiation for society. Grade School, I’ve always said, is all about learning how to LEARN. High School and beyond is practical life application of learning. (Middle School or Junior High is a transitional stepping into society.) By the end of 6th grade, every American should be ready to actively join society as a productive member. This is right around the age of accountability… bar/bat mitzvah. It is the point of accountability to God and Country. (How about Source and Planet?)
Therefore, Book of I is intended for those who have reached the age of accountability. The Book of I is all about self-control and self-determination and personal responsibility.