I still haven't quite forgiven Garry Wills' for his book What Jesus Meant but he remains one of my favorite American historians. Few are able to weave the story of religion through American history and politics the way Wills does. Now on vacation I'm making my way through his 2007 Head and Heart: American Christianities. Too many American historians are ignorant of religious influences over U.S. history. But from the American Revolution to the Civil Rights Movement to the war in Iraq - not to mention women's rights and environmental issues - religion, for better or worse, has played a central role in policy making and in our common social values either directly or indirectly. Christianity is deeply intertwined with our national history and Wills does a great job illustrating this. A wonderful summer read.