
author
1873–1926
An Austrian philosopher and tireless reference writer, he became best known for making big philosophical ideas easier to navigate. His dictionaries and studies of thinkers such as Kant helped spread philosophy to a wider reading public.

by Rudolf Eisler
Born in Vienna in 1873, Rudolf Eisler studied philosophy and earned his doctorate in 1894. He later lived in Vienna as an independent scholar and writer, building a reputation for clear, wide-ranging reference works in philosophy.
Eisler is especially remembered for encyclopedic books and dictionaries of philosophical terms, along with studies of major thinkers including Kant. His work helped organize and explain complex ideas for students and general readers, which is a big reason his name still appears in philosophical reference circles today.
He was also the father of composer Hanns Eisler and the political figures Gerhart Eisler and Ruth Fischer. Rudolf Eisler died in Vienna in 1926.