David M. Greene is an author who may not be as universally recognized as some literary figures unless you're referring to a specific David M. Greene within a field such as history, education, or another domain. Authors with common names can often be confused with one another, so without additional context, it can be challenging to provide a precise description. It's worth noting that there might be several authors with the name David M. Greene, each with their own areas of expertise and published works. If you could provide more specifics about the David M. Greene in question, such as the titles of his works or his field of study, it would be possible to give a more detailed description.