This is a clearly written, readable, original, and constructive interpretation of the history of philosophy in hte West from the sixth century before Christ to the present. As the best-known living representative of process philosophy, Hartshorne shows that it has anticipations in Plato, Aristotle, Leibniz, Hegel, Schelling, and many others, even including the materialist Epicurus and the atheist Nietzsche. Process philosophy and theology have significant overlap with the views of most of the creative, constructive philosophers and theologians of recent times, including Peirce, William James, Bergson, Heidegger, Paul Weiss, Berdyaev, John Findlay, Paul Tillich, Sartre, Merleau-Ponty, and others. This philosophy takes creative freedom, transcending causal determinism, and a generalized idea of sympathy--"feeling of feeling," love--as universal principles of life and nature.