Overview of religious freedom debate is easy to read

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The author of this readable and informative volume -- Kevin Seamus Hasson -- studied law and theology at the University of Notre Dame and is the founder of the Becket Fund for Religious Liberty, so is well qualified to take on what was a central set of questions for the founders of the American republic, questions still being debated today.
He begins with legal cases challenging the "under God" phrase in the Pledge of Allegiance recited in public schools and other events. Does this amount to the establishment of a religion or of religion itself?