Talking about novels and stories primarily as instruments of ideology circumvents much of the fictional enterprise. 

划线部分为介词短语，英语中十分常见。它用在名词之后，说明该名词的身份、特征等。按照传统语法分析，一般认为是前面名词的补足语，本句则是“主语补足语”。理由是，它们存在主表关系：novels and stories primarily are instruments of ideology circumvents 。

但是，现代语法更注重动词，把它看作是修饰 taliking 的方式状语。

本句主要结构是：动名词短语作主语；circumvents 谓语动词；much of the fictional enterprise 宾语。

Talking about novels and stories primarily as instruments of ideology circumvents much of the fictional enterprise. 

【翻译】把小说和故事主要当作意识形态的工具来看待，会在很大程度上阻碍小说创作的发展。