What does Realpolitik mean?

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. The term realpolitik is sometimes used pejoratively to imply politics that are coercive, amoral, or Machiavellian. Realpolitik is a theory of politics that focuses on considerations of power, not ideals, morals, or principles. Balancing power to keep the European pentarchy was the means for keeping the peace, and careful Realpolitik practitioners tried to avoid arms races.