 Levinsohn labored assiduously for the well-being of his coreligionists in Ukraine.He worked out and submitted to the government various projects for the amelioration of the condition of the Jews, such as the plan he submitted to the crown prince Konstantin in 1823, his memorandum to the minister of education in 1831, his project in regard to the censorship of Jewish books in 1833, and his plan for the establishment of Jewish colonies in 1837.Nicholas I gave the last careful consideration.