May 5, 1813 - Nov 11, 1855 Danish philosopher and theologian. Contemporary thought and theology. Kierkegaard strongly criticized Hegelianism of his time and what he saw as the empty formalities of the Danish church. Philosophy of Religion, Faith, God, Christian Church and Christian eithics and theology.

November 8, 1848 – July 26, 1925 Friedrich Ludwig Gottlob Frege was a German mathematician who became a logician and philosopher. He helped found both modern mathematical logic and analytic philosophy with influence on 20th-century philosophy.

May 20, 1806 – May 8, 1873 Mill was a British Philosopher, a civil servant, member of Parliament and a very influential liberal thinker of the 19th century. John Stuart Mill's journey in Philosophy started at a very young age and was heavily influence and educated by his father, James Mill, (Scottish Philosopher and Historian). Other influences include Plato, Aritstotle, Aquinas, Hobbes, Locke, Bentham. His interests were in Political philosophy, Empricism, Utilitarianism, Ethics, Inducive logic and Liberalism.

Oct 15, 1844 - Aug 25, 1900 Friedrich Wilhelm Nietzsche - German Philosopher and classical philologist. Notable for the generation of extensive secondary literature in continental and analytic philosophy.

Feb 22, 1788 - Sept 21, 1860 German, Western Philosopher known for his atheistic pessimism and philosophical clarity. Schopenhauer influenced modernist thinkers in the areas of art and psychology.

May 25, 1803 - April 27, 1882 Western Philosopher, American essayist, poet and leader of the transcendentalist movement in early 19th century. Famous speech: 'The American Scholar'.