Two major developments of the last two decades have radically undermined traditional justifications of leftist politics: the failure of 20th-century `socialist' experiments, and what might be termed the deessentializing movement in contemporary philosophy. However, the social injustices that animated revolutionary thinkers in many respects remain, and some have arguably worsened in the era of globalized capitalism. This article investigates whether it is possible to articulate a new theoretical underpinning for progressive politics that nevertheless avoids the essentialist moves of Marxism. Ethico-political readings of Derrida - one of the most influential anti-essentialist thinkers - are compared to Ernesto Laclau's attempts at formulating...