In the history of Christian apologetics there have been many lawyers who have written texts commending and defending their faith. In recent years writers such as John Warwick Montgomery, Ross Clifford and Philip Johnson have described the contributions made by lawyers as a distinct school of thought and use the terms "juridical apologetics", "jural apologetics" and "legal apologetics". These writers point to the Seventeenth century Dutch legal scholar Hugo Grotius as one of the first juridical apologists. Montgomery, Clifford and Johnson argue that Greenleaf may be ranked as one of the most important representative figures of this particular school of apologetic thought. Johnson states that Greenleaf, "must be regarded as "the" pivotal figure in juridical apologetics."[https://web.archive.org/web/20070405091241/http://www.trinitysem.edu/journal/philjohnsonpap.html]