In internal politics, Piłsudski's reign marked a much-needed stabilization and improvement in the situation of ethnic minorities, which formed almost a third of the population of the Second Republic. Piłsudski replaced the National-Democratic "ethnic-assimilation" with a "state-assimilation" policy: citizens were judged by their loyalty to the state, not by their ethnicity. The years 1926–1935 were favourably viewed by many Polish Jews, whose situation improved especially under the cabinet of Piłsudski's appointee Kazimierz Bartel. However a combination of various reasons, from the Great Depression, through the Piłsudski's need for support from parties for the parliament's election to the vicious spiral of terrorist attacks by Organization of Ukrainian Nationalists and government pacifications meant that the situation continued to degenerate, despite Piłsudski's efforts.