The main action of Bismark was the Unification of Germany- before the territory was occupied by only loosely connected independent states. Additionally, he contributed to promoting peace in Europe.
Some of his policies included introducing welfare state, including providing health insurance, and accident insurance.
I believe the answer is; a<span> leader-exchange theory
The theory suggest that every time leaders make interactions with their subordinates, those subordinates would become more understanding of the leader's expectation and vision, which make them become more responsible and trustworthy for the leaders.</span>