Incluye referencias bibliográficas e índice CONTENIDO: Comparing ourselves to others: envy and scorn divide us -- Signatures of envy and scorn: we know them when we see them -- Who cares about comparisons? -- Why do we compare? Comparison informs us -- Why do we compare? Comparison protects us -- Why do we compare? comparison helps us fit into our groups -- Beyond comparison: transforming envy and scorn.