This chapter lists the blessings for obedience and the punishments for disobedience. It really is just that simple. And you might think that after all the children of Israel had seen God do, in Egypt and at Mount Sinai, that disobedience would be practically unheard of. 

Leviticus 26

“You shall not make idols or graven images, neither stand up pillars, nor set up any image of stone in your land, to bow down to it: for I am the LORD your God.