Originally Posted by gerv
End of the book would read like this, "Eventually breathing was considered too much effort, so the whole population expired."
That was part of the storyline of the movie "
Serenity". Humans were terraforming all the planets and on one planet they added some chemicals to keep people from becoming too aggressive. It went out of control. Most of the people became so passive that they eventually stopped eating and breathing, but a small portion of population mutated to become hyper-aggressive savages. Serenity is also the only science fiction movie that I can recall that had bicycles in it. Actually they looked like Worksman industrial trikes but the principal was there.