He was a friend of many celebrities in Berlin, among them the theoretical physicist Albert Einstein, about whom he was the first to publish a book in the summer of 1920 and consequently popularize the theory of relativity.

[1] In his autobiography he wrote: "At the beginning of the 20th century the question of the conceivability of other worlds with modified physics and mathematics will be highly employed.

His parents emigrated the following year to Breslau where he grew up with his brother Moritz, who later achieved fame as a pianist and composer.

However, there being many differences between Stettenheim and him, he founded his own satirical magazine, the Lustige Blätter, which reached large print runs particularly in the Weimar of the time.

He was a personality of the Berliner society, and with celebrities such as Albert Einstein, he was among the first writers to bring the Theory of Relativity to a wider audience.