Marxist-Leninist socialism is the hardiest Leftist opposition tradition.

Evidence

In Western societies for the better part of the past two centuries, the active and intellectual opposition of the Left to class rule has been vitalized by the vision of a socialist order: an arrangement of human relations grounded on the shared responsibility and authority over the means of social production and reproduction. The variations on the vision have been many, but over the years of struggle the hardiest tradition has proven to be that identified with the work and writings of Karl Marx, Friedrich Engels, and V. I. Lenin. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 113

Categorization

• XREF: connects to: Comintern left factions resisted united-front strategies toward socialists. — Antonio Gramsci, Selections from the Prison Notebooks, 164
• yield-rescued: below the book’s yield-target cutoff, included anyway for connecting to: Comintern left factions resisted united-front strategies toward socialists. — Antonio Gramsci, Selections from the Prison Notebooks, 164