The Presocratic Philosophers by Jonathan Barnes is a comprehensive and extensive book. It delves deep into the beliefs and contributions of the Pre-Socratic philosophers. These were a group of early Greek thinkers who lived prior to Socrates and made profound contributions to the growth of philosophy. They were highly interested in comprehending the nature of the world and the universe. They employed observation, reason, and intuition to formulate their theories.
One of the central themes of the book is the assertion that the Pre-Socratic philosophers were focused on understanding the nature of the world and the universe. They believed that there was a fundamental substance or principle underlying all of reality. Different philosophers had different views on what this substance was. Thales thought it was water, Anaximenes believed it was air, Heraclitus proposed that everything was in a state of constant flux and change, and Parmenides argued that the universe was eternal and unchanging.
Barnes emphasizes the importance of reason and logic in Pre-Socratic philosophy. He states that reason is the tool of philosophy, and the Presocratics were the first to use it systematically in the pursuit of understanding the world. Another significant aspect was the emphasis on reason and evidence rather than blind faith, as seen in Xenophanes' arguments. Zeno of Elea developed paradoxes to challenge our understanding of reality and the limits of human reason.
The book also highlights the diversity of ideas among the Pre-Socratic philosophers. There was no one unified school or doctrine, and they often held opposing views on key issues. Pythagoras, perhaps the most famous of them, was known for his work on mathematics and geometry, believing that the universe was fundamentally mathematical.
Overall, the Pre-Socratic philosophers made crucial contributions to the development of philosophy and science, and their ideas still impact our understanding of the world today. As Bertrand Russell noted, they were the first to use their reason to uncover the structure of the world. Barnes himself writes that they were the first to take the initial steps on a long journey that would ultimately lead to the development of modern science and philosophy. The Presocratic Philosophers is indeed an intriguing exploration of the beliefs and contributions of these early Greek thinkers.
A truly excellent book that provides an introduction to the Presocratic philosophers through a reading of the existing fragments of the works of different thinkers. Each section is dedicated to a particular philosopher and begins with a small introduction, which is then followed by the various fragments organized by themes. This way of ordering is quite advantageous in some cases as it gives a structure to the fragments. For some thinkers, this is very useful due to the limited amount of existing material and its scattered nature.
The only possible criticism is that in some way this structuring and, in the case of some thinkers, the very selection of fragments can make the interpretation too guided and rigid. However, the authors are careful to include comments on different interpretations from those presented by them.
Beyond this, I find that this book serves an essential function for the general study of Presocratic philosophy and I have not seen another book that does a better job for this purpose.