Viewed through the diplomatic dispatches and personal diaries of the various ambassadors, foreign ministers, prime ministers, and heads of state, it appears that the catastrophe of WWI was essentially inevitable. No country was purely to blame, and each was acting in what it felt was its essential interest. No one wanted the war, but fear drove them to it. For Austria, fear of decline and Serbian nationalism. For Russia, fear of revolution and loss of prestige. For Germany, fear of a two-front war and the "slavic threat." For Britain and France, fear of German ambition.
As a Diplomacy enthusiast, this was a fantastic book.