När var den första utomjordiska invasionen att innehålla mer än en främmande art?

I William Tenn s 1953 novell "Fria jorden " (först publicerad i Framtida Science Fiction , maj 1953 , tillgänglig på Internetarkiv ), invaderas jorden upprepade gånger och erövras av två invandrade raser, Dendi och Troxxt.

Från Wikipediaartikel :

"The Liberation of Earth" is a science fiction short story by William Tenn, written in 1950, first published in 1953, and reprinted over a dozen times in various anthologies and in 1955 in the William Tenn collection Of all Possible Worlds. The story, which Tenn described as having been inspired by the Korean War, portrays Earth as the battleground between two powerful alien races, the Troxxt and the Dendi, who repeatedly "liberate" it from each other.

At the time the story begins, the Troxxt and the Dendi have long since abandoned the (literally) shattered remnants of Earth as being too dangerous for civilized people; humanity is nearly extinct, with the few survivors having descended into starving savagery as they struggle for air.

Några extrakt från en trevlig lång recension av The Mumpsimus :

"The Liberation of Earth", written in 1950 and published in 1953, predicted the "we had to destroy the village to save the village" attitude. "Predicted" may not be accurate, since such an attitude has probably been a part of human history from long before the Vietnam war, but Tenn's story so perfectly elucidates that homocidal way of thinking that it was, he says, read aloud at protests during the war. (He also says he wrote it with the Korean war in mind, wanting to write something from the perspective of the people being "liberated", though he adds that "...recently I have come to the conclusion that if I had been a Korean, North or South, under those same circumstances, I would very much have welcomed the U.S. intervention. Am I growing old? Or just official?")

[. . .]

The history we get here is a history related by a devolved human, a human relegated to sucking whatever air he can get on an Earth that has been liberated nearly into oblivion by various alien visitors who used the planet and the people for their own purposes and then abandoned the place.

Det här är nog inte den typen du letar efter, men i början av Poul Anderson s 1951 Elves-and-Aliens garn "Interloper" (novelette, först publicerad i Magazine of Fantasy and Science Fiction , april 1951 , tillgänglig på Internetarkiv ) jorden styrs hemlighet och exploateras av utlänningar från flera närliggande stjärnor

"Precisely what forms of exploitation are carried on here?" asked the Alf.

"Various ones, depending on the race," said Hraagung. "The Procyonites find Earthlings an excellent source of blood. The Altairians simply want to observe historical processes, as part of their project of mass-action study. The Arcturian economy depends on controlling the productive facilities of a great number of subject planets, skimming the cream off their industry and agriculture. We of Sirius find Earth a convenient military outpost and refueling station—also—" the thought was like a tiger licking its lips—"the natives serve other purposes."

som tyst invaderade jorden i antiken.

"You must realize," thought Kane, almost conversationally, "that the exploitation of Earth is quite old. In fact, the first Vaettir arrived here—" he thought of a length of time which Beoric rendered as about four thousand years ago. "We began to colonize extensively about seven centuries ago, at which time the native civilization was less complex and it was very easy to pass oneself off as whatever one desired. Thus our organization is firmly established. Through the corporations we control on Earth, the governments which we influence—or run outright whenever it is necessary, through the old and highly reputable family connections of some of the Vaettir, through a number of other means which you can easily imagine, we can do exactly as we please, under the very noses of the natives." For a moment his iron features split in a grin. "The only ones who suspect that Earthlings are not their own property are labelled cranks—and generally the label is quite correct."

I 1994-videospel Reunion störs planetens hela fred på jorden av själsbefinnande utomjordingar som ingår i en liga. Denna liga består av minst fyra olika arter, från olika planeter. Mer information här.