Due to the rise of Sophistry, Philosophy had lost meaning and reputation. Socrates was the first to realize that argumentative method was in a dire need of refinement and regularization. Socrates himself introduced the concept of definition. Imagine how meaningless those arguments would be that did not employ definitions with specific scope.
Regularization of arguments then reached to its peak through the special efforts of Aristotle. Without Socrates, by now, philosophy would have become total meaningless jumble of words.