Think of civil society and the state as joined in a marriage of necessity. You already know who the wife is, the one who is supposed to love, cherish and obey: that's civil society. Think of the state as the domineering husband who expects to have a monopoly on power, on violence, on planning and policymaking.

I grew up with landscape as a recourse, with the possibility of exiting the horizontal realm of social relations for a vertical alignment with earth and sky, matter and spirit. Vast open spaces speak best to this craving, the spaces I myself first found in the desert and then in the western grasslands.

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.

What's your story? It's all in the telling. Stories are compasses and architecture; we navigate by them, and to be without a story is to be lost in the vastness of world that spreads in all directions like arctic tundra or sea ice. To love someone is to put yourself in their place, we say, which is to put yourself in their story, or figure out how to tell yourself their story. Which means that a place is a story, and stories are geography, and empathy is first of all an act of imagination, a storyteller's art, and then a way of traveling from here to there.

If sorrow and beauty are all tied up together, then perhaps maturity brings with it not what Nabhan calls abstraction, but an aesthetic sense that partially redeems the losses time brings and finds beauty in the faraway.

Perhaps the central question about [Eliot] Porter's work is about the relationship between science, aesthetics, and environmental politics. His brother, the painter and critic Fairfield Porter, wrote in a 1960 review of [Porter's] colour photographs: 'There is no subject and background, every corner is alive,' and this suggests what an ecological aesthetic might look like.

Italian cities have long been held up as ideals, not least by New Yorkers and Londoners enthralled by the ways their architecture gives beauty and meaning to everyday acts.