What is the main conflict in Mountains Beyond Mountains by Tracy Kidder?

Mountains Beyond Mountains traces Dr. Farmer's struggle to establish quality health care in lands devastated by loss of agriculture, political turmoil, and poor finances. Paul spent more than twenty years creating health clinics, schools, and homes for destitute people. Along the way he made many friends, both in the United States and abroad. He influenced the prestigious World Health Organization and battled for better tuberculosis treatment protocols. The world would benefit from following his example—the medical records of his patients at Zanmi Lasante prove that his methods are successful.