Besides the imposition of a uniform Russian culture throughout the empire, the government's pursuit of Russification, especially during the second half of the nineteenth century, had political motives. After the emancipation of the serfs in 1861, the Russian state was compelled to take into account public opinion, but the government failed to gain the public's support. Another motive for Russification policies was the Polish uprising of 1863. Unlike other minority nationalities, the Poles, in the eyes of the Tsar, were a direct threat to the empire's stability. After the rebellion was crushed, the government implemented policies to reduce Polish cultural influences. In the 1870s the government began to distrust German elements on the western border. The Russian government felt that the unification of Germany would upset the power balance among the great powers of Europe and that Germany would use its strength against Russia. The government thought that the borders would be defended better if the borderland were more "Russian" in character. The culmination of cultural diversity created a cumbersome nationality problem that plagued the Russian government in the years leading up to the revolution.