Volume 1
- Features updates and revisions to all essays from original volume, plus the addition of 11 new authors
- Includes six new essays featuring coverage of theorists not included in original volume: Ibn Khaldun, de Tocqueville, Schumpeter, Mannheim, Veblen, and Adorno
- Supplemented with comprehensive bibliographies on primary and secondary sources, with a brief reader's guide accompanying each essay
- Addresses continuing relevance of most theories and their importance to contemporary scholarship
 Volume 2
- Features updates and revisions to all essays from original volume, plus the addition of 16 new authors
- Includes 11 new essays featuring coverage of theorists not included in original volume, including Deleuze, Bauman, Smith, Luhmann, Agamben, and others
- Supplemented with comprehensive bibliographies on primary and secondary sources, with a brief reader's guide accompanying each essay
- Essays placed in social and historical context to allow readers to see how theorists have responded to pressing contemporary social and political issues