PositiveNew York Times Book ReviewDan Chapman retraces the ecologist John Muir’s thousand-mile walk through the Reconstruction-era South, and what he finds there today is alarming ... It is Chapman’s mission not only to stand in Muir’s shoes to see what he saw, but to view Muir’s world through a 21st-century lens ... It is difficult to look at ... One of the curious revelations of these books as a whole is the apparent frequency with which men sleep outside without permission ... Humans have done grievous harm to the earth in the past 150 years; it is exhausting at times to look at what we’ve done.