 He stressed historical materialism in particular, assigning it a character of scientific discovery and a doctrine, indeed forming Marxism as such.A case in point is "Anti-Dühring", which supporters of socialism, like its detractors, treated as an encompassing presentation of Marx's thought.And while in his extensive correspondence with German socialists Engels modestly presented his own secondary place in the couple's intellectual relationship and always emphasised Marx's outstanding role, Russian communists like Lenin raised Engels up with Marx and conflated their thoughts as if they were necessarily congruous.