Her main thrust in the book was about the evils of communism.
"So commies don't want to ruin civilization?"
You are having a logical disconnect here, it does not matter to this subject, if the commies want to ruin civilization or not. This book was about value for value, not something for nothing(communism)...worked by your ability, paid by your need.
Maybe you should reread this book? I still don't think you've read it, but that's just based on your comments here, and what do I know...
Lurker
As I recall, the book rambles on for a thousand pages about the evils of communism. Rand only offers up her alternative to communism at the end of the book in a long monologue by "John Galt." As I said previously, it is her criticisms of communism which are worth reading. What she offers as an alternative is nothing but a caricature of what commies think "capitalists" are like. She holds up the accumulation of material wealth as the height of virtue. "If it feels good, do it" is not a conservative credo. Conservatives believe in more than just amassing wealth and gratifying the self. We do not believe that voluntary self-sacrifice is an evil. We believe in charity.
From the little to nothing that you've said about the book, I doubt you've read it.