Russian Philosopher

Name	Date of Birth	Date of Death
H. P. Blavatsky	August 12, 1831	May 8, 1891
Isaiah Berlin	June 6, 1909	November 5, 1997
Morris Raphael Cohen	July 25, 1880	January 28, 1947
Nikolai Berdyaev	March 18, 1874	March 24, 1948