"The ... unfriendly visitors - the Borg - are not the only way we'd hope to help you. We also have lots of technology for things like curing the sick, enabling faster transportation, or preventing famine. Though you do seem to be good at the famine prevention bit yourself."
"But yes, we are also here because of the Borg."
He considers showing them holograms of the horrors of the Borg... probably not a good idea right now. Too much like... trying to take advantage of emotions.
"The Borg is an omnicidal mega-civilization* that searches for life in order to assimilate it - where assimilation roughly entails murdering and puppeting the corpses of their victims to turn them into more Borg. The vast majority of sentient warp-capable** civilizations we know of in this section of space are working together to defend against the borg, under an agreement known as the Pact - the most prominent such groups being the Amalien Alliance, which I represent, and the United Federation of Planets."
"This agreement first came about when the Borg discovered a wormhole*** to this portion of the galaxy and poured through. A lot of planets were lost - over 75 billion people. We've managed to keep them from spreading, and are working to expel them and close the wormhole. We think we've stopped their invasion through the wormhole. We hope that they won't find another one - if they do it's likely they'll overwhelm the immediate area before we will be able to stop them."
"But. Even if all of that goes fine. The Borg don't need a wormhole to get here. They're on the other side of the galaxy, but we're pretty confident that they're moving towards us, via warp drive rather than wormhole. If they sent a fleet towards us when they first made contact they could possible be here in as few as 50 years if they went full speed. We think they're probably taking their time, assimilating anyone thye find on the way to us. Our best guess is they will be here in 110 years. At the most, 200."
"We need to be able to stop them by the time they get here. And ... we don't have a good a idea about how to do it."
"Part of the mission of the Amalien Alliance is to find civilizations like yours, and give them warning and aid. So even if the Borg do find a wormhole, maybe you will be able to flee or stand your ground until help comes. And maybe you'll help find a way to stop them completely."
"I ... don't want to come across as if I'm trying to scare you. I tried not to high-light the scariest bits, cause I don't want it to seem like I'm trying to use 'motions to get you to make a really really important decision."
*mega-civilization translates as "something larger than an individual civilization typically is". The three known mega-civilizations are: the Amalien Alliance, the Federation, and the Borg.
**warp-capable translates as "able to travel between stars quickly"
*** translates as "shortcut through space"