Invariance is a French journal edited by Jacques Camatte, published since 1968. It emerged from the Italian left-communist tradition associated with Amadeo Bordiga and it originally bore the subtitle "Invariance of the theory of the proletariat", indicating Bordiga's notion of the unchanging nature of communist theory. However it soon broke with many of the tenants of Bordigism and Marxism per se., arguing that in the aftermath of May '68 there was no longer any potential for the working class… (More on Invariance)