Subtitle: How The World's Most Notorious Rodent Clawed Its Way To The Top
To close the first chapter, Langton answers the question, why write about the rat?
"The rat may be small and ugly. It may not inspire awe as it nibbles and gnaws and skulks its way through life. But it can do something remarkable. It can compete with us as a wild animal and win. It hasn't become our friend like the dog or our captive like cattle, but instead lives alongside us, as constant companion, irritant, and sworn enemy. While human mistakes and negligence have led many species to extinction and thousands to the brink of annihilation, gargantuan, concerted efforts to rid ourselves of rats have failed miserably. There are more now than ever before and their population continues to boom. Truly it is the animal we can't get rid of, the only one capable of challenging human hegemony of the planet, that deserves to be called King of Beasts."
You've read a hundred stories about humanity driving some beautiful or terrifying animal to the brink of extinction, or beyond. This is the story about what happens when we try, but cannot.
I bought this book a while back, and it stayed on my "needs to be read" shelf, getting passed over in favor of weightier matters, until I became aware that the rats had returned to my attic. We had them years ago, but a raccoon moved in and that seemed to send them on their way. Then the raccoon left, and for a while we had no neighbors upstairs. Once they returned, I did what any self-respecting nerd would do:
1) I got on the internet and found someone to email, and then send an electronic payment to, to fix the problem
2) I started reading a book on the subject
So, it turns out that having a rat infestation in your house (ok, maybe that's an exaggeration since I never saw one, but anyway), and reading a book about rats right before going to bed, does not help you sleep well. But, it was freakin' fascinating.
Langton is not here to tell you that rats are actually beautiful and gentle. He's here to tell you that there is only one thing, in the history of the planet, which has ever permanently eradicated black rats (rattus rattus) from a region of any significant size. That one thing, is an infestation of brown rats (rattus norvegicus). It's not immediate, but over time the brown rats will shove their slightly smaller cousins out of the area. There may be years go by in which the black rats live in the attics, and the brown rats live in the basements, but eventually the brown rats take over.
Poisons, introduced predators, traps, and bait are all manifestly unable to eradicate a rat population for any length of time. The only, ONLY thing that will work is to make sure they can't get to any food. Langton spend several chapters telling about the many, many failed attempts by humans to get rid of rats, going back to the dawn of history (more properly, the dawn of grain agriculture).
Because, in reality, the reason rats have boomed in population is, us. More precisely, our agriculture. We grow food that they like, and then we clear the area of large predators. Mature rat females can nurse while pregnant, and it takes about as long for them to wean as to gestate, so as soon as one litter is ready to send on their way, the next litter is ready to be born. There is really no way to kill them fast enough, if they have food available, and places to hide in which natural predators cannot get into. Our houses could hardly be better designed for fostering rats if we'd tried.
One more quote from Langton, from near the end.
"Of course, it doesn't take a genius to see that the rat's story is a disturbingly familiar allegory of our own. Rats started small and only a few thousand short years ago they were struggling for their very existence with the other competitors in swamps while we were duking it out with the other big predators on the grasslands. But then these animals started living together for mutual safety and to gather enough food so that their increasingly large omnivorous colonies fed during hard times. They made elaborate homes and developed social structures that simplified their lives and ensured that important genetic material was spread around, further guaranteeing the survival of the group. They learned ways to protect themselves from their enemies and from the poisons in their environment. They have been so successful that they number in the billions and occur in every country in the world.
But the flipside of their almost unprecedented success has been the destruction they've caused. Rats have transformed a large number of islands into wastelands barren of any other animal life. They have been responsible for the extinction of hundreds of species of plants and animals and the regional extirpation and endangerment of many more. They have killed plenty of their own kind and millions of ours. They destroy their habitat and environment, while breeding at a rate that seems ridiculous when compared to what the world will actually sustain."
This, really, is why "Rat" is a great book to read. It is a dark mirror of our own species, both by analogy and by looking at our response to them. There is only one way to reduce or eliminate the rat population: clean up and secure the food and water sources. There is no other way. You can spend money on designer chemicals, it will only provide temporary relief (if that). You can pay people to kill them with traps, either of spring-loaded wire or glue. You can pay as much money as you wish, but if you do not address the root of the problem, they can simply adapt and reproduce their way around your defenses.
Rats are what happen when you are too lazy to fix the root cause. Instead, put your house in order. Like so many of our problems today, the problem is not so much that the solution is hard to figure out, as that it is something which cannot be substituted for. No wonder chemical can fix the problem, but there are plenty of people willing to take your money in exchange for lying to you, and telling you that they can make the problem go away without you having to address the root cause. Pick almost any environmental, medical, or financial problem today, and the pattern is similar. The rat, is both consequence and symbol of our failings as a society. Fix the root cause, or all will be in vain. Langton shows us the long history of humans, failing to fix the root cause, while the problem only grows in numbers.
Why are rats the only mammal able to thrive in the face of such revulsion from humans? Because they are our evil twin. Read up on your evil twin, Langton's book is an excellent source. But don't do it right before you go to sleep.