Question

The unification of Germany under Otto Von Bismarck demonstrates the

Answer 1

The unification of Germany under Otto von Bismarck demonstrates the power of nationalism.

Explanation:

Otto von Bismarck was Minster President and Minister of Foreign Affairs for the Kingdom of Prussia.  He used Realpolitik (reality politics) methods to promote nationalism under Prussian leadership,  aligning other German states together with Prussia into the German Empire.  (He then became Chancellor of the German Empire.)   He helped create wars with neighboring countries to increase national pride among the German people.

The main wars that Bismarck provoked in order to rally German territories together around those militaristic causes were the Austro-Prussian War (1866) and the  Franco-Prussian War (1870-71).

Answer 2

The unification of Germany under Otto Von Bismarck demonstrates the "power of nationalism," since before nationalism became a prominent force in European culture, the idea of having a strong nation based on racial backgrounds was not important.