Date of Birth: 04/12/1862
Place of birth: Zhytomyr
He graduated from the Law Faculty of the University of Novorossiysk. He joined the Narodnaya Volya. In February 1887 Kroll was arrested on charges of state crime; at the end of 1888 sent an administrative order in Eastern Siberia. During his stay in the Trans-Baikal region, he studied law and economic life of the Buryats and wrote a series of articles on the ethnography, published in the "Proceedings of the East-Siberian branch of the Imperial Russian Geographical Society" and in the writings of the Chita Troitskosavsk and offices of the Company.
In 1895, Kroll returned to European Russia. In 1897 he took part in the expedition to study land tenure in the Trans-Baikal region, held under the leadership of AN Kulomzin, and was the 10th edition of the expedition published "Materials Kulomzin Commission", "land use in the Trans-Baikal region." This work gave a picture of the evolution of land use from the most primitive forms of the newest forms of that time and finds out with the help of statistical method, the close relationship between land use and other forms expressed in figures, economic elements.
Of the other statistical work Kroll chief: "The role of the railways and waterways in freight transport of the Volga region" (SPb., 1902) and "craft work among the Jews in western Russia" ( "Collection of materials on the economic situation of the Jews in Russia" that is, . I). He published an article in "Eastern Review", "Siberia", "New Word", "St. Petersburg Gazette", "Northern Courier", "peace of God", "Life", "Scientific Review", "Sunrise", "Son of the Fatherland "and other periodicals.
At the beginning of the XX century, he joined the Socialist-Revolutionaries and became an active member of the Jewish national movement. He served as counsel to the processes associated with the Jewish pogroms.
In 1917, a member of the Peasant Union, a deputy of the Constituent Assembly.
Since 1918, in exile, living in Paris, he was to bring together Russian-Jewish intellectuals in France. The employee magazine "Modern notes". From France, he moved to the US, where published the first volume of memoirs.