Probably the most influential of all twentieth century Protestant theologians. His Commentary on Romans (1919), which reflected his seering experience of the First World War, is a challenge to the church and world alike to face up to the radical demands of God's revelation. This inspires his sharp distinction between authentic Christianity and those sections of the churches which went along with the ideology of the Third Reich. Ethics must acknowledge the depth of human wickedness and our total dependence on God's grace.

• http://www.ucc.org/faith/barmen.htm

• http://www.geocities.com/johnnymcdowell/Karl_Barth.html

...plus secondary comment

• http://168.229.236.7/~bcurtis/kung.html

...Robert Curtis S.J. bases this discussion upon Kung's book Justification: The Doctrine of Karl Barth and a Catholic Reflection.

• http://www.religion-online.org/cgi-bin/relsearchd.dll/showbook?item_id=2729

• http://www.island-of-freedom.com/BARTH.HTM
• http://www.faithnet.org.uk/Theology/barth.htm
• http://www.christianitytoday.com/ch/2000/001/5.23.html

• http://www.theology21.org/christianbook/karl_barth.htm