Such large, impersonal manipulation of capital and industry greatly increased the numbers and importance of shareholders as a class, an element in national life representing irresponsible wealth detached from the land and the duties of the landowners; and almost equally detached from the responsible management of business.

　　结构分析：句子的框架是Such large, impersonal manipulation greatly increased …shareholders as a class, an element…主语和宾语都有较长的短语和of结构限定，并且分句是由两个and相连的3个部分组成的。分句an element…landowners 又带有两个定语，一个是representing… ，另一个是detached…。

　　译文： 对资本和企业进行大规模的非个人操纵，大大增加了股东作为一个阶级的数量和重要性。这个阶层作为国计民生的一部分，代表了非个人责任的财富与土地及土地所有者应尽义务的分离，而且也几乎与责任管理相分离。