In "Mountains Beyond Mountains," Tracy Kidder explores Dr. Paul Farmer's unwavering commitment to providing healthcare to some of the most vulnerable populations. Despite the hardships and lengthy hikes required to reach patients living in remote areas, Farmer is resolute in his belief that every life counts equally. He challenges the notion that a long journey is unwarranted for the sake of a few individuals, asserting that such a mindset devalues human life. This perspective fundamentally drives his work in global health.

Farmer's dedication is not merely about logistics but about addressing a deeper ethical issue. He recognizes that the idea of some lives being less valuable than others is a dangerous philosophy that underpins many of the world's injustices. By continuing his efforts despite the challenges, he emphasizes the need to prioritize those who are often overlooked, reinforcing that every effort made for the sake of another person's well-being is vital. His activism highlights the importance of compassion in healthcare and humanity.