In 1781 he went to Amsterdam, where he was one of the leaders in the fight for the emancipation of the Jews, writing in the promotion of this cause his Beleuchtung ... das Bürgerrecht der Juden Betreffend, Amsterdam, 1795, and Appell an die Stände Hollands, etc., ib., 1797.
In 1781 he traveled to Amsterdam, where he was a key figure in the struggle for Jewish emancipation, penning works such as Beleuchtung ... das Bürgerrecht der Juden Betreffend and Appell an die Stände Hollands, etc., which promoted this cause.