Dialectics, Phenomenology|Philosophy - history -19th century|Fuerbach critique and philosophy|Religion-Self-alienation of human consciousness|Materialism, Politics|Hegel, George Wilhelm Friedrich, 1770-1831- philosophy -criticism|Fuerbach and Leibniz|Reason, Existence and creation|Phenomenology, Religion Feuerbach, L.A. 1804-1872 works & influence