This review article analyses three books published between 2010 and 2013 and explores the ways in which a nation, secular or otherwise, can deal with religion within its borders, both legally and socially. For many nations, this means employing a foundational document or text, usually a constitution, to exclude religion from, neutrally to structure its participation in, or actively to promote a particular type of it in the public arena. The article develops two primary themes. First, using Ran Hirschl's work, it reveals a continuum of approaches to the constitutional treatment of religion; yet, in plotting those points along the continuum, what one finds is far from precision placement; rather, there is oscillation around several points. Second, in considering specific constitutions, it becomes apparent that the more difficult or ambiguous it is to modify or amend a formal text, the greater the importance assumed by judicially developed interpretative techniques.