Space — as landscape, terrain, spectacle, experience — has vanished. - Rebecca Solnit

Walking . . . is how the body measures itself against the earth.

This is a paradise of rising to the occasion that points out by contrast how the rest of the time most of us fall down from the heights of possibility, down into diminished selves and dismal societies. Many now do not even hope for a better society, but they recognize it when they encounter it, and that discovery shines out even through the namelessness of their experience. Others recognize it, grasp it, and make something of it, and long-term social and political transformations, both good and bad, arise from the wreckage. The door to this ear's potential paradises is in hell.

Perhaps walking is best imagined as an 'indicator species,' to use an ecologist's term. An indicator species signifies the health of an ecosystem, and its endangerment or diminishment can be an early warning sign of systemic trouble. Walking is an indicator species for various kinds of freedom and pleasures: free time, free and alluring space, and unhindered bodies.