The difference between strategy and tactics is that strategy is, having a plan of action or policy designed to achieve a major or overall aim. Such as a master plan, game plan. Now tactics are the way you run out the plan. It's the way you handle the method of movement during the strategic plan. The difference between realist and idealist is that realist look at the bigger picture meaning security, and national interests. Idealist’s wish and follow non logical ideas. The two main principles are discrimination and proportionality