Hooberus, thanks for the link. Now I see where you get your ideas from. You are quoting from an online textbook (must be over 1000 pages) by Professor Mark Ridley. It looks like a fantastic resource. Each chapter finishes with a summary, and a quiz, to see if you have understood.
You seem to have not understood the issue though. Your quote is from the "A-Z Browser" which is the definition section for all of the various terms used. You should read "Chapter 7: Natural Selection and Random Drift in Molecular Evolution". This is a long chapter dealing with the issue of what proportion of changes in proteins and DNA are due to "natural selection" vs "random drift". Here is a link to the summary page at the end of that chapter:
A more succinct summary would be, to quote Richard Dawkins:
"It is becoming increasingly clear that most molecular evolution is due to natural drift."
The important point is that, although the issue has been a matter of considerable debate in the scientific world, it does not in any way undermine the theory of evolution.