- Karl Barth 1886-1968 A Karl Barth Homepage An Introduction to Karl Barth Karl Barth on Religion Karl Barth is considered by some the greatest Protestant theologian of the 20th century and possibly the greatest since the Reformation. More than anyone else, Barth inspired and led the renaissance of theology that took place from about 1920 to 1950. The son of the Swiss Reformed minister and New ...www.island-of-freedom.com/BARTH.HTM