 Why were the beings readily applying for the trip to Earth?
It was our first day of recruiting on the planet, and the alien life-forms had lined up for hundreds of feet back from my rented office. The aliens came in every shape and form, in all colors and textures—and all of them eager for a Corrigan contract. The Galaxy is full of bizarre beings, but there's barely a species anywhere that can resist the old exhibitionist urge. Stuff like this: Want to visit Earth—see the Galaxy's most glittering and exclusive world? If you are a non-terrestrial, there may be a place for you in the Corrigan Institute of Morphological Science. It's the best of its kind, the only really decent place where Earthmen can get a gander at the other species of the universe. "I'll be placed on exhibition at your Institute on Earth. A Terraphile alien who goes to the extent of rechristening himself with a Terran monicker would work for nothing, or even pay us, just so long as we let him get to Earth. He was followed by a roly-poly blue-skinned humanoid from Donovan's Planet, four feet high and five hundred pounds heavy. It was the isolationism of the late 29th century that turned me into the successful proprietor of Corrigan's Institute, after some years as an impoverished carnival man in the Betelgeuse system. Back in 2903, the World Congress declared Terra off-bounds for non-terrestrial beings, as an offshoot of the Terra for Terrans movement. Before then, anyone could visit Earth. After the gate clanged down, a non-terrestrial could only get onto Sol III as a specimen in a scientific collection—in short, as an exhibit in a zoo. Every alien wants to see Earth once in his lifetime, and there's only one way he can do it. At the same time, we had turned away a dozen ursinoids, fifty of the reptilian natives of Ghryne, seven Sirian spiders, and no less than nineteen chlorine-breathing Procyonites wearing gas masks. "I happen to be a representative of the only Earthlike race that exists anywhere in the Galaxy but on Earth itself. The demand for beings from Wazzenazz XIII is pretty low these days. There's no such place as Wazzenazz XIII and there's only one human race in the Galaxy—on Earth. The first harbinger of woe turned up after lunch in the person of a Kallerian. I had turned away three more ursinoids, hired a vegetable from Miazan, and said no to a scaly pseudo-armadillo from one of the Delta Worlds.
 If was their only opportunity after the Terra for Terrans movement.
 They were looking for a way to overturn Earth.  If was their only opportunity after the Terra for Terrans movement.  They were bored of their lives on their home planets.  They were hoping for handouts.