Read this post for a comparison between Francis Schaeffer and R.J. Rushdoony:

The Chalcedon Foundation - Faith for All of Life

Francis Schaeffer did much good, but I believe Dr. Rushdoony's legacy is much greater, as he did not avoid the "hard sayings" of Scripture, which is something that many of Francis Schaeffer's greatest admirers often do.

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Daniel Ritchie
Saintfield, Northern Ireland - Queen's University, Belfast:History/Politics
Member of Dromara Reformed Presbyterian Church of Ireland (Covenanter)