announcer: next, author philip greenwalt talks about how at the end of the civil war, southerners grappled with the question of why the confederacy lost. he argues that many of their writings served as a foundation for the lost cause. the emerging civil war blog hosted this event. it is about 50 minutes. chris: the next gentleman who is coming up here is actually author of three books.

announcer: next, author philip greenwalt talks about how at the end of the civil war, southerners grappled with the question of why the confederacy lost. he argues that many of their writings served as a foundation for the lost cause. the emerging civil war blog hosted this event. it is about 50 minutes. chris: the next gentleman who is coming up here is actually author of three books. he started out writing about a subject near and dear to him, the 1864 campaign in the shenandoah valley. the book is called "bloody autumn." he followed that up with "hurricane from the heavens," and most recently, "calamity in carolina: the battles of bentonville." greenwalt started out as an intern. he has since joined the park service, has done a wonderful job with george washington's birthplace, where he was an interpreter for several years, but most recently, he has decided to go into alligator land and has bowed down at the everglades, where he has been for just a month or so. he is taking time to talk to us about a subject that eric introduced us to just moments ago, the the foundational document of t