1893 – Born in Knoxville, Tennessee on the 25th of November.
1918 – He serving in the army, he then travelled in Europe for a year with friend Mark Van Doren. Afterwards, he worked as teacher at Brooklyn Polytechnic.
1929 – He became a theater critic for The Nation and wrote several books, gaining acclaim through a work critical of the impact of science and technology, The Modern Temper.
1937 – He worked as a professor at Columbia University.
1940 – He also wrote biographies of Samuel Johnson and Henry David Thoreau.
1952 – He wrote books about natural issues of ecology, the southwestern desert environment, and the natural history of the Grand Canyon.
1970 – Died from colon cancer on the 22nd of May.