Realpolitik refers to politics or diplomacy based primarily on power and on practical and material factors and considerations, rather than ideological notions or moralistic or ethical premises. In this respect, it shares aspects of its philosophical approach with those of realism and pragmatism
Pragmatism is a philosophical tradition centered on the linking of practice and theory. It describes a process where theory is extracted from practice, and applied back to practice to form what is called intelligent practice...

. The term realpolitik is sometimes used pejoratively to imply politics that are coercive, amoral, or Machiavellian.

Mittel Energie auszuüben und nur ihn anzuordnen der Energie besitzt kann sie ausüben. Dieser direkte Anschluß der Energie und der Richtlinie bildet die grundlegende Wahrheit aller Politik und den Schlüssel zu aller Geschichte.

Translation: To rule means to exercise power, and only he who possesses power can exercise it. This direct connection of power and rule forms the fundamental truth of all politics and the key to all history.