In Valences of the Dialectic, Frederic Jameson does what Kolakowski failed to do in his third volume of Main Currents of Marxism: provide an intellectually rigorous appraisal of western Marxist political philosophy in the second half of the 20th century. Like with Kolakowski, Jameson begins with an historical overview of dialectical thinking that influences Marx and Marxist writing. Starting with Hegel, then working through Marx, Jameson broadly defines dialectical thinking in terms of contradiction, a definition he holds to throughout the different valences presented in the book. These valences include commentaries on the (mostly French, mostly post-1968) philosophers influenced by Marx, key historical concepts of Marxism as it plays out as both a political program and a philosophical critique of politics in the 20th century, and ending with a meditation on the emergence of history and historical thinking. Jameson is, as always, lucid and interesting, offering interpretations of Derrida, Lenin, Sartre and Lukacs among others while also taking up Marxist economics in an era of advanced globalization. A challenging book with plenty to offer.