In this book, first published in 1981, Professor McPeck offers a critique of the major ideas and important work in the field of critical thnking, including those of Ennis and de Bono, while at the same time presenting his own rigorous ideas on the proper place in critical thinking in the philosophy of education. The book aims to establish a sound basis on which the role of critical thinking in schools can be evaluated and the author makes a strong case for the contribution it can make to resolving current dilemmas of the curriculum.