Book excerpt: The 58th annual volume of the Socialist Register takes up the challenge of exploring how the new polarizations relate to the contradictions that underlie them and how far 'centrist' politics can continue to contain them. Original essays examine the multiplication of antagonistic national, racial, generational, and other identities in the context of growing economic inequality, democratic decline, and the shifting parameters of great power rivalry. Where, how, and by what means can the left move forward?