An essential aid for students of political and social sciences, as well as for those who wish to explore the ideas and background of those who played a crucial role in shaping social and political thought in the 20th and 21st centuries, the "Dictionary of Thinkers of the 20th Century" familiarizes the reader with the important political thinkers from the early years of the 20th century to the present day.

The volume includes:
- 175 entries written by one hundred or more established scientists and experts in their respective academic fields.
- Entries sorted alphabetically, each with a biography, clear description of the main ideas and theories of each thinker, brief quotes and their texts, brief and updated bibliography, complete Greek bibliography of their translated works until the end of 2011, and suggestions for further research.
- Also, references to important thinkers from Asia, Africa, and Latin America, as well as those who contributed to the problematic of social movements, ecology, dependency theories, left and liberal thought.
- Complete thematic index.