What is the theme in Sam Houston and the American Southwest by Randolph B. Campbell?

Moderation and peace is a central theme in this book. Author Randolph B. Campbell stresses that many of Houston's personal beliefs and public actions were motivated by his practical, level-headed, and grounded nature. Some of this personality may have developed during Houston's formative years when he lived both with his family and with the Cherokee Indians under Chief Oo-loo-te-ka. Houston saw the effects of war and strife upon the Cherokee people, instilling in him a desire to pursue justice for Indians, and a desire to pursue peace.