In a 2000 book outlining the major schools of apologetics, the presuppositional approach was given equal time alongside other schools of thought (the "classical" and "evidential" noted above, for example). In general, Van Til's approach is far more popular and widespread than Clark's. Van Til is considered by Dr. John Frame, Professor of Systematic Theology and Philosophy at Reformed Theological Seminary, to be one of the most outstanding apologists of his time due to his being "probably the best versed on the history of philosophy and the philosophical issues that bore upon Christianity".