What is the theme in Crossing Open Ground by Barry Lopez?

Another theme is the relationship between humanity and landscape.A key component of the author's exploration of humanity's relationship with nature is his exploration of how human beings interact with, and are defined by, a particular aspect of nature - specifically, the landscape. This thematic concern is touched in several of the collection's essays, most notably in "The Stone Horse", "Gone Back Into the Earth" and "Yukon Charley ...", all of which describe the author's contemplations of how both the outer and inner lives of human beings are shaped by their relationships with the land and environment around them.