Ryazanov, David (1870–1938)
Ryazanov was born David Borisovich Goldendach on 10 March 1870, in Odessa. Because of his connections, first with the Narodniks, then with the budding social democracy, he spent several years in prison. In 1898, he joined the new Russian Social Democratic Party, belonging after 1903 to the Menshevik wing. Between 1900 and 1905, he did research abroad on the labour movement and contributed to Kautsky’s Neue Zeit. He participated in the Revolution of 1905, and by 1907 was again in Germany, doing that research on Marx and Engels on which his fame is mainly based.