Rosetti was financially ruined by his poor investments in the grain trade, and, from 1898, withdrew to secondary jobs in the Foreign Affairs Ministry. Although he lacked a formal training, he was a treasured polyglot, and achieved his notoriety as a scholar and social critic. His early studies focused on Moldavia's legal and social history, but later took up more politically charged themes. A mild antisemite and adversary of Jewish emancipation, Rosetti then turned to criticizing his own class and its manorialism, constructing an influential paradigm in progressive historiography. Welcomed into the ranks of left-wing Poporanism by 1906, he proposed a radical land reform and prophesied the peasants' revolt of 1907.