Subterfuge by Ray Bradbury
Published in Astonishing Stories, 1943.
A very different take on the alien invasion story. Humanity knows it cannot stop this invasion. So the leaders develop a plan that has half of the population committing suicide. When the only hope for mankind involves the death of that many humans, you realize how scary it has become.The rest are … changed. I will not reveal the rest of the story. You need to read it for yourself.