If Democrats want to understand what makes people vote Republican, they must first understand the full spectrum of American moral concerns. They should then consider whether they can use more of that spectrum themselves. The Democrats would lose their souls if they ever abandoned their commitment to social justice, but social justice is about getting fair relationships among the parts of the nation. This often divisive struggle among the parts must be balanced by a clear and oft-repeated commitment to guarding the precious coherence of the whole. America lacks the long history, small size, ethnic homogeneity, and soccer mania that holds many other nations together, so our flag, our founding fathers, our military, and our common language take on a moral importance that many liberals find hard to fathom.
Unity is not the great need of the hour, it is the eternal struggle of our immigrant nation. The three Durkheimian foundations of ingroup, authority, and purity are powerful tools in that struggle. Until Democrats understand this point, they will be vulnerable to the seductive but false belief that Americans vote for Republicans primarily because they have been duped into doing so.