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

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.