Max Simon Nordau (born Simon Maximilian Südfeld; July 29, 1849 – January 23, 1923), was a Zionist leader, physician, author, and social critic.
He was a co-founder of the World Zionist Organization together with Theodor Herzl, and president or vice president of several Zionist congresses.
As a social critic, he wrote a number of controversial books, including The Conventional Lies of Our Civilisation (1883), Degeneration (1892), and Paradoxes (1896). Although not his most popular or successful work whilst alive, Degeneration is the book most often remembered and cited today.
Nordau was born Simon Maximilian, or Simcha Südfeld, on 29 July 1849 in Pest, then part of the Austrian Empire. His father was Gabriel Südfeld, a Hebrew poet. His family were religious Orthodox Jews and he attended a Jewish elementary school, then a Catholic grammar school, before receiving a medical degree from the University of Budapest in 1872. He then traveled for six years, visiting the principal countries of Europe. He changed his name before going to Berlin in 1873. In 1878, he began the practice of medicine in Budapest. In 1880 he went to Paris. He worked in Paris as a correspondent for Die Neue Freie Presse, and it was in Paris that he spent most of his life.