Karl Barth, who lived from 1886–1968, was perhaps the most influential theologian of the twentieth century. Church Dogmatics, Barth’s monumental life-work that consists of more than 6 million words, was written over the span of 35 years. In it, Barth covers in depth the great doctrines of the Word of God, God, Creation and Reconciliation. He made it his task “to take all that has been said before and to think it through once more and freshly to articulate it anew as a theology of the grace of God in Jesus Christ.”

If you have an interest in theology, you should own Barth. Barth’s dogmatic theology is loaded with engaging and provocative ideas, which will challenge you for years to come. Two characteristics that define Barth’s theology are his emphasis on the person of Christ (Barth “works from Christ outward”) and his insistence that ethics and theology cannot be separated. Barth taught that “theology is ethics,” since knowing God entails doing his will.

Barth’s theology was shaped by his experience of living and teaching in Germany during the rise of Nazism. By 1934, Barth had become a leader in the Confessing Church movement, which stood in courageous opposition to Nazism at a time when the German Protestant church had largely endorsed National Socialism. This stand cost him his professorship at Bonn University and he was forced to flee the country in 1935.

Barth has been called neo-orthodox, evangelical, and Reformed. Indeed, his views developed remarkably over his lifetime as he moved from a liberal position to one of dialectical theology (theology founded on paradoxes or tensions). Later in life, Barth abandoned the views of Friedrich Schleiermacher, Rudolf Bultmann, and the liberal tradition. He argued that God was not made in man’s image but is instead “Wholly Other.”

Barth is probably best described as “ecumenical” since his work is read by Protestants and Roman Catholics, mainstream and evangelicals. Indeed, Barth was described by Pope Pius XII as the most important theologian since Thomas Aquinas, and his work continues to be a major influence on students, scholars and preachers today