Who started what? Here's some basic reading on the subject. It's the text I read in a course on the civil war, taught btw, by a professor who studied under Allan Nevins at Columbia. There was SO much more going on than just who fired the first shot in anger.
"Long considered the standard text in the field,
The Civil War and Reconstructionoriginally written by James G. Randall and revised by David Donaldis now available in a thoroughly revised new edition prepared by David Donald, Jean H. Baker, and Michael F. Holt. Maintaining the accuracy and comprehensiveness that distinguished the original, the revised edition incorporates the best new scholarship in the field. Expanded and updated coverage of social and cultural history includes detailed discussions of southern society, slavery and the African-American experience, the experiences of women, and issues of class. The postwar chapters have been reconceived to treat Reconstruction as a national, rather than a regional, problem, exploring the connections between developments in the South and parallel changes in the North."
http://www.goodreads.com/book/show/1569244.The_Civil_War_and_Reconstruction