So why was Thirties humanity so eager to destroy 99.99% of it, in an act of collective plenticide that would have dwarfed the Nazi genocide of Jews and Romas ?
For in virtually all the illustrated fantasies about future life spawned by a raft of interwar era popular science magazines, humanity is seen as living inside an man-made plastic bubble on stark rock planets.
Inside the bubble, we humans are using some futuristic form of atomic energy to turn the bare rock into synthetic versions of all the things humans need to survive.
LIFE (other life anyway) was clearly 'not wanted on this future voyage'.
Today's children might innocently think 1930s humanity would instead cherish every last example of LIFE, from invisible bacteria to blue whale, if only as companions to share humans' otherwise incredibly lonely existence on a vast totally empty and hostile Universe.
But instead educated humanity during the Great Depression sought, via Eugenics, to eliminate every example of humanity that didn't fit their concepts of perfection and normality.
And the educated's casual acceptance of over-fishing and over-hunting, combined with scientific humanity's enormous research into various lethal forms of pesticides, suggested that the 1930s thought they could get along, quite nicely thank you, without other lifeforms competing for Earth's supposedly limited non-biological resources.
But LIFE is actually far more unstable than even the most unstable metallic element.
And no, lifeforms can't really survive by taking in each other's laundry.
Lifeforms can only flourish and reproduce by recycling each other's poop, because LIFE actually makes use of very little of the rock that makes up almost all of this planet.
Instead, we earthlings live out our entire lives on the Earth's surface , surviving off of and in the debris LIFE itself has created over four billion years.
We living beings ceaselessly recycle each other's waste products or decaying dead bodies, constantly re-creating the humus of LIFE.
Remember, all the oxygen we humans need to survive is just a waste product to the plants and microbes that need to throw it off if they too are to survive.
Meanwhile many of the microbes, in turn, only survive by consuming the dead bodies of other life - humans among that number.
LIFE only comes as one complete - indivisible - package and this package currently seems to be unique to this single tiny little planet in all the vast Universe.
So, no The Sixth Extinction and Plenticide isn't murder : its murder-suicide ....