How did the emergence of germany as a new nation-state affect the european political scene after 1870?

Germany's arrival disrupted the established order

Explanation:

At that time, the strongest empire in Europe implemented absolute monarchy to their people, which make the kings and nobles possess overwhelming power over the commoners. They also spent the majority of people's taxes to the military.

Germany is the one that first focus its effort on people's personal freedom and economic development rather than military. Their model was seen as very favorable by citizens in other country, and create a disruption in the current established order.