Rage by Bob Woodward:
The president-elect next voiced approval of torture as the quickest way to obtain information from captured terrorists.
Mattis didn’t want to spend time explaining the origins of his personal philosophy. He subscribed to the beliefs of General John Lejeune, the legendary World War I general often described as the greatest Marine of all time. Lejeune believed the Corps not only had to make efficient fights, but return better citizens to society. Inflicting torture caused spiritual damage and produced horrible people, Mattis believed. It undermined the country’s moral authority.