All of the people in the area were Muslim. Many of the tribes he encountered were acutely xenophobic and anti-Christian. Material possessions were few; his travel companions generally owned camels, guns, the shirt they were wearing, and little else. Even settled tribes seemed to have very few possessions. His travel companions were willing to kill for their tribe or traveling companions as a matter of honor. They were generous to the point of poverty, always offering food to anyone they met while traveling, even if it meant they went without any food for the day or longer, and Thesiger's companions seemed incapable of saying no to a request, even if it threatened the provisions required to cross the desert. It is also clear that there is great variation in degrees between different areas and tribes, with some not so concerned about Christians and others calling Thesiger's companions infidels because they were accompanied by a Christian.
In the five year period in which Thesiger completed his travels the area was in constant turmoil. Tribal alliances were complex and the areas of conflict were constantly shifting. Thesiger follows these tribal conflicts like a local, and recounts tribal conflicts that consolidated power and facilitated exploration for oil in the period between his travels and when he wrote the book.
The rigors of the desert created a society that differs dramatically from our own Anglo-Saxon society. This book provides insight into where the Muslim religion was formed, and the growth of values that seem utterly foreign to many westerners, which is especially significant in the current climate of Christian-Muslim animosity and the global threat of terrorism.
Thesiger aspired to define neither Arabs nor Muslims in this work. However, his keen observations of the Bedu peoples amongst whom he traveled provide insight into the values of both. Thinking back on my geography education, reading this book would have broadened my understanding of the Middle East far more than the chapters of our text book on the topic managed. On top of all this, it details the challenge of crossing a desert five hundred miles across by foot, with only the provisions they could carry on their camels, amongst warring tribes. It's well worth reading.