How did Bismarck utilize realpolitik to unify Germany?

Bismarck utilized realpolitik by prioritizing practical considerations over ideology or moral principles. He used a combination of diplomacy, warfare, and careful maneuvering to rally the German states behind Prussia's leadership. By appealing to nationalist sentiments and skillfully manipulating power dynamics in Europe, Bismarck was able to achieve the unification of Germany under Prussian dominance in 1871.