What is the author's tone in The Best and the Brightest by David Halberstam?

The tone of the book is objective and factual. The author presents many quotes from reports, meetings, and interviews pertaining to the situation. The book contains a great deal of information that gives the reader the proper historical context for viewing the situation in. Without this background information, such as the colonialism and the events after World War II, the reader could not view Indochina in the proper perspective.