Huh, I wonder which one--
Oh. Right. Well, this is a story that I still might write, but I can tell the basic gist behind it.
The story is a postapocalyptic one, with the Earth so destroyed that there's no good soil left anywhere in the world. To answer this problem, scientists came together to create a substance filled with all the necessary nutrients to nourish people... And they succeeded. This drug is named Methusalem according to a person who(in a certain story) lived for over nine hundred years.
Very soon, everyone finds out that Methusalem comes with major side effects - it gives those ingesting it preternatural abilities, and also instills them with cravings. Every time one ingests Methusalem, these cravings intensify, eroding their mind and increasing vice. Thus a society of slowly degrading mental health is born.
In their regret, the populace gives Methusalem a new name: Meth(for its narcotic properties). And this is where our story begins...
EDIT: Honestly, I still sometimes feel drawn to this story because its themes resonate with me on a deeper level. It might also have the most organic cast I've ever planned... But that might just be my own opinion. XD