What is the role of an editor(i.e. General Editor) in publications? Gerald C. Gross in his book Editors on Editing: What Writers Need to Know About What Editors Do points out that the role of a editor is:
"…to suggest changes where they seem desirable or even essential. In doing this the editor is acting as the first truly disinterested reader, giving the author not only constructive help but also, one hopes, the first inkling of how reviewers, readers, and the marketplace (especially for nonfiction) will react, so that the author can revise accordingly. However he or she is regarded, an editor is, or should be, doing something that almost no friend, relative, or even spouse is qualified or willing to do, namely to read every line with care, to comment in detail with absolute candor." 
Gross also writes that if an editor does not hold to their convictions then they have not done their job in the publication process. So, according to Gross, an editor plays a significant role in the writing process.
 Gross, Gerald C. (1993-05-01). Editors on Editing: What Writers Need to Know About What Editors Do (p. 6). Perseus Books Group. Kindle Edition.
 Gross writes, “Much has been written about the various responsibilities the editor has: to the author, to the publisher, to the consumer, and to the book itself. Too little, however, has been said of the editor’s responsibility to his or her own integrity: the duty to be true to one’s political, moral, ethical, societal, and aesthetic convictions.”
Gross, Gerald C. (1993-05-01). Editors on Editing: What Writers Need to Know About What Editors Do . Perseus Books Group. Kindle Edition.