Mewis completed an apprenticeship as a locksmith at the Deutsche Reichsbahn. He joined the Socialist Workers' Youth in 1922, the Communist Youth League of Germany in 1923, and the Communist Party of Germany (KPD) in 1924. From 1925 to 1928, he was the chairman of the Hessen-Waldeck branch of the Communist Youth League,[1] and from 1929 to 1932, he was the organizational secretary of the KPD District Directorate in Magdeburg-Anhalt.[2]
Nazi Germany
From 1932 to 1934, Mewis attended the International Lenin School in Moscow, after which he worked illegally for the KPD as the Political Leader of the Wasserkante Party District (consisting of Hamburg and Schleswig-Holstein) until 1936.[1] He became a candidate member in 1935 and a full member in 1939 of the Central Committee of the KPD. In 1936, he emigrated to Denmark, where he led the "Northern Section" of the illegal KPD. At the end of 1936, Mewis went to France. He then succeeded Franz Dahlem in leading the International Brigades in the Spanish Civil War from 1937 to 1938.[1] In April 1937, he worked in Barcelona as a high-ranking Comintern representative. From May 1938, he was the head of the "KPD Central Section" in Prague. After the occupation of Czechoslovakia by the Nazis, he fled via Denmark to Stockholm. There, Mewis initially led the new "KPD Central Section." In the autumn of 1939, he was summoned to Moscow. He was tasked with establishing a new leadership of the KPD in Sweden, along with Herbert Wehner and Heinrich Wiatrek, to coordinate illegal activities in the German Reich territory. This led to significant conflicts and disputes with Herbert Wehner.[1][2]
After the arrests of Herbert Wehner and Heinrich Wiatrek, Mewis was also arrested on 19 August 1942. Until the summer of 1943, he was interned in Smedsbo. After his release, Mewis led the KPD leadership in Sweden.[3] He worked closely with Richard Stahlmann during this time.[2] During this period, Mewis increasingly distanced himself from orthodox communist views and the Soviet model of communism. He advocated for close cooperation with social democratic and bourgeois exile or resistance groups.[1]
From autumn 1943, Mewis was a member of the "Association of German Trade Unionists" in Sweden and a leading member of the board of the Free German Cultural Association in Sweden. At the same time, he was the editor of Political Information and publications of the German Emigration Directorate.[1][2]
Mewis' tenure was largely unsuccessful.[1] He was primarily known as a loyal ideologue but had little knowledge or understanding of economics. His leadership was additionally strained by bad relationships with his colleagues in COMECON, especially the Polish, who complained about his arrogance and lack of knowledge.[3]
In January 1963, Mewis was relieved of all his duties due to the so-called supply crisis in the GDR (1962/63) and replaced by economics expert Erich Apel. He subsequently worked to ambassador in Poland until 1968,[1][2][3] a sinecure since the relationship between Poland and East Germany was managed by the Soviet Union. From 1969, he worked as a research fellow at the Institute for Marxism–Leninism at the Central Committee of the SED.[2]
As part of his research for the novel "The Aesthetics of Resistance," Peter Weiss conducted a lengthy interview with Karl Mewis about his time in emigration.
He married Auguste Reichert in Kassel in 1927 (divorced in 1934). In 1939, he married Luise (known as Liesel), the daughter of the communist politician Franz Dahlem, who lived with him in Stockholm (*1919, divorced in 1953, died in 1957). When his mentor Franz Dahlem was deposed under the pretext of having relationships with Noel Field, who was denounced as an American spy, Mewis did not participate in the campaign against him, but he also did not defend him. He later separated from his daughter, who was fatally ill with cancer. Both marriages produced children, including Liesel Catherine (*1941, married Haacke, Africanist with a doctorate), Franz (longtime opera singer in Rostock), and Annette (Ph.D. in media studies).