 Why do the Vegans want the humans to be involved in their political struggle?
He ignored the snarling, the spitting, the waving of boneless prehensile fingers, as he ignored the heavy gravity and heavier air of the unfamiliar planet. These humanoids had large mouths and sharp teeth, and they unquestionably slavered. If they carried out the threats of their present attitude, Earth would have to send Marshall to replace him. "Just tell him that a man has arrived from Earth to talk to him. Behind him stood a heavy and pompous appearing Vegan in lordly trappings. "But then I'm told you're an Earthling. "It was only decided yesterday, back on Earth, that I would be the one to make the trip here. What I meant was that I expected someone from Earth to break through our blockade and come here. "If you wanted someone from Earth to come here to see you, why did you put the cordon around Earth? And why did you drop a planet-buster in the Pacific Ocean, and tell us that it was triggered to go off if we tried to use the distorter drive? But you did come, so I can tell you that although I am the leader of one of the mightiest peoples in the Galaxy, whereas there are scarcely six billions of you squatting on one minor planet, we still need each other. "We offer you partnership with us to take over the rule of the Galaxy from the Sunda—the so-called Master Race." There are more inhabited planets in the Galaxy than there are people on your single world. I, personally, rule three hundred trillion people, half of them of my own race. "You upstart Earthlings are a strange and a frightening race," he said. There was even serious discussion of destroying Earth out of hand, while it is still possible. There were at that time three different but similar racial strains of pulpy bipeds, numbering a total of perhaps a hundred thousand individuals. While these creatures could by no means be classed among the intelligent races, there was a general expectation, which we reported to the Sunda, that they would some day come to be numbered among the Servants of the Emperor. So we let you alone, in order that you could develop in your own way, until you reached a high enough civilization to be useful—if you were going to. "You Earthlings, in defiance of all expectation and all reason, have exploded into space.
 They think the humans can add an unexpected element to their war
 They think their numbers will even the fight  They see the humans as having a complementary skillset  They are desparate and will try anything to change their situation  They think the humans can add an unexpected element to their war