Well, for one thing, the illustration is amazing. The more you look at it, the more cats you see.
The article is terribly long but this is a complex problem. Franzen starts by describing the trap/neuter/release method that is used in LA but this is obviously not going to make a big enough dent in the outdoor cat population. There needs to be a multifaceted approach that includes not interfering with the natural order. Instead, people in Pasadena actually considered an eradication program for coyotes because they were killing the outdoor cats! Fortunately, they voted it down. I lived in Los Angeles for almost a decade and there is much wildlife there, including not only coyotes but birds of prey such as the California condor.
There should be a place where unhomed cats can live relatively safely. When I was in Rome, I loved the cats that lived among the ruins such as the Pantheon. These cats are fed and protected. I don't know what all the people do to manage the populations but they should be consulted. As always, we could learn much from Europe but we don't bother to.
Midway through, Franzen starts talking about his real love, birds. It's true that the bird population has fallen alarmingly. My upstairs renter always has a full bird feeder or two on the raised deck, and I've started seeing more birds. But bird lovers unfairly demonize cats. The decrease in birds is also a complex problem and pollution is a bigger threat than domestic cats. My cat has never caught or killed a bird or anything bigger than a spider. As you know, she did bring in a chipmunk one time, but she didn't harm it. She was carrying it like she would a kitten.
I was at a workshop last fall when we heard a lot of cheeping around a tree. The baby birds had gotten too big for the nest and the mother bird was pushing them out. There were about eight small birds hopping around on the ground. They weren't able to fly yet. We asked our teacher/owner what to do and he said, "Let nature take its course." I knew there were many natural predators around. One of the babies hopped into my hand and I took it over and let it loose under some sunflower plants that were enclosed in a fence. Birds are the descendants of dinosaurs so you would expect them to be more resilient.