Abstract
Errol Harris’s new book is an impressive and bold attempt to call into question the presuppostions of modern thought and to argue that a dialectical conception of logic and metaphysics is what is required by present-day science and culture. Whether Harris will convince his readers of the validity of Hegelian dialectical logic, I am not sure. What is certain, however, is that this book poses a challenge to contemporary philosophy that deserves to be taken seriously. Harris has produced a highly stimulating book that will be of interest to students of logic, metaphysics, epistemology, philosophy of science and ethics, of any philosophical persuasion.