Evald Ilyenkov did original work on the materialist development of Hegel's dialectics, notable for his account of concrete universals. His works include Dialectical Logic (Russian, 1974; English trans. 1977), Leninist Dialectics and the Metaphysics of Positivism (Russian, 1980 (posthum.); English trans. 1982) and The Dialectics of the Abstract and Concrete in Marx's Capital (Russian, 1960; English trans. 1982). Ilyenkov committed suicide in 1979.