Served in the German Army during World War I Read more about Served in the German Army during World War I
Studied law Educational Activities Education and/or PhD in related fields (i.e. psychology, psychoanalysis, economy, law, pedagogy, philosophy, religion studies) Read more about Studied law
Friedrich's activities in Mandatory Palestine/Israel (1934 - ?) Read more about Friedrich's activities in Mandatory Palestine/Israel (1934 - ?)
Friedrich's activities in Germany (? - 1934) Read more about Friedrich's activities in Germany (? - 1934)
Awarded the Israel Prize in education (1957) Read more about Awarded the Israel Prize in education (1957)
Imprisoned by the British Mandate authorities (1940) Read more about Imprisoned by the British Mandate authorities (1940)
Founded and directed the Ben Shemen Youth Village Read more about Founded and directed the Ben Shemen Youth Village