The peasants' uprising of February, which seemed to confirm Rosetti's foretelling, had erupted outside Hârlău, but soon spread throughout the land, prompting Sturdza's return as Prime Minister. During these events, Radu Jr was tasked with protecting Jewish property in Bucharest against antisemitic backlashes. Rosetti put out his other key work of history later in 1907. Titled "Pentru ce s-au răsculat țăranii?" ("Why Did the Peasants Rebel?"), it argued that the uprising marked a reaction against the latifundia and tenancies. Building on earlier observations, he documented the survival of serf-like obligations under the guise of a new regime. As he noted, peasants being forced to pay for fodder and informally pressured or terrorized into reimbursing corvées, and often reduced to lassitude and alcoholism. With this tract, Rosetti also emerged as a supporter of radical land reform, arguing that capitalism was remaking the village into a "plutocratic assemblage". His became the orthodox interpretation in Romanian historiography, with Rosetti being recognized by scholar Lucian Boia as a "rejuvenator" who "gave Poporanism a historical grounding."