1918 in philosophy was at the end of World War I.
Events August – Ludwig Wittgenstein completes his Tractatus Logico-Philosophicus.
Publications William Inge – The Philosophy of Plotinus
Births June 9 – John Hospers, American philosopher (died 2011) October 16 – Louis Althusser, French Marxist philosopher (died 1990)
Deaths April 4 – Hermann Cohen, German philosopher (born 1842) May 30 – Georgi Plekhanov, Russian revolutionary and philosopher (born 1856) September 28 – Georg Simmel, German sociologist and philosopher (born 1858)
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