This book explores and analyzes the critique of modernity in the thought of the German philosopher Martin Heidegger, as a critique of technology and Western metaphysics. Mohamed El-Sheikh explains how Heidegger views the essence of modernity as lying in the dominance of the technological perspective on the world, which has obscured the authentic meaning of existence. The book reviews Heidegger's pivotal concepts such as "Dasein," "Being," and "the ontological difference" as starting points for overcoming the crisis of modernity. The work represents a precise reading of one of the most complex and influential philosophical projects of the twentieth century.