  | 1917/18 soldier in World War I
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  | in the Weimar Republic he is a member of the German Democratic Party (DDP)
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  | 1933-1939 lecturer at the University of Cologne
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  | 1934-1945 member of the Confessional Church
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  | 1936-1949 director of mines in Essen
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  | 1945 co-founder of the CDU
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  | 1946-1949 Chief Mayor in Essen
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  | concurrently Land Minister of Justice of North Rhine-Westphalia
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  | 1947-1948 Chairman of the Synod of the Protestant Church in Germany (EKD)
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  | 1949/50 Federal Minister of the Interior in the first Adenauer cabinet
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  | 1950 Heinemann resigns under protest because of Adenauer’s rearmament policy; resigns from the CDU
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  | 1952 founder of the All-German People’s Party, dissolves the Party after defeat in the Federal election 1953
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  | 1957 enters the SPD, SPD delegate in the Bundestag 1957-1969
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  | 1966-1969 Minister of Justice in the “Grand Coalition”
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  | 1969-1974 Federal President |