"Changing the way we're growing old"

By 2050, 1 in 5 Americans will be seniors. Worldwide, almost 2 billion people will be 60 or older, 400 million of them over 80, says the AP:

Atlanta is creating what it calls "lifelong communities." Philadelphia is testing whether living in a truly walkable community really makes older adults healthier. In Portland, Ore., there's a push to fit senior concerns such as accessible housing into the city's new planning and zoning policies.

Such work is getting a late start considering how long demographers have warned that the population is about to get a lot grayer.

"It's shocking how far behind we are, especially when you think about this fact — that if you make something age-friendly, that means it is going to be friendly for people of all ages, not just older adults," said Margaret Neal of Portland State University's Institute on Aging.

Civi-physics

We know that "civics" derives from the Latin word for "city." But what is a city?

A physicist named Geoffrey West felt something key to our understanding of cities was missing:

“We spend all this time thinking about cities in terms of their local details, their restaurants and museums and weather,” West says. “I had this hunch that there was something more, that every city was also shaped by a set of hidden laws.”

West and others now aim to reduce the concrete metropolises spread across the globe to abstract equations, says the New York Times:

West and Bettencourt discovered that all of these urban variables could be described by a few exquisitely simple equations. For example, if they know the population of a metropolitan area in a given country, they can estimate, with approximately 85 percent accuracy, its average income and the dimensions of its sewer system. These are the laws, they say, that automatically emerge whenever people “agglomerate,” cramming themselves into apartment buildings and subway cars. It doesn’t matter if the place is Manhattan or Manhattan, Kan.: the urban patterns remain the same. West isn’t shy about describing the magnitude of this accomplishment. “What we found are the constants that describe every city,” he says. “I can take these laws and make precise predictions about the number of violent crimes and the surface area of roads in a city in Japan with 200,000 people. I don’t know anything about this city or even where it is or its history, but I can tell you all about it. And the reason I can do that is because every city is really the same.”

In terms of the language of Civics 101, this has implications:

It suggests, for instance, that modern cities are the real centers of sustainability. According to the data, people who live in densely populated places require less heat in the winter and need fewer miles of asphalt per capita. (A recent analysis by economists at Harvard and U.C.L.A. demonstrated that the average Manhattanite emits 14,127 fewer pounds of carbon dioxide annually than someone living in the New York suburbs.) Small communities might look green, but they consume a disproportionate amount of everything. As a result, West argues, creating a more sustainable society will require our big cities to get even bigger. We need more megalopolises.

There's a lot more to the article and the thinkers it features, including this insight from Jane Jacobs: The city wasn’t a skyline — it was a dance.