Starting with an insight into theoretical opinions or parliamentarism and the division of power, my intention was to offer all ideas and concepts in one place. Ideas of different authors with their backgrounds bring different views on power and the need for its division. Today, in most systems of the world, the three divisions of power have been maintained - although in history the two divisions of power have had their position - with greater or lesser differences in power and governing. In this paper, the emphasis is on parliamentary states since I believe that the will of the parliament - thus the citizens - is insufficiently implemented in parliamentary states, which contributes to aversion to government and politicians in general. Starting with the premise applied in democratic societies according to which sovereignty belongs to the people who transfer excercise of those sovereignties, for the most part or completely, to their representatives. Elected representatives of the citizens form a representative body that is authorized to pass the highest expression of sovereignty in a democratic society - law. The law is a general rule of a legally binding act, which gives the impression that the legislation has the exclusive authority of a normative function, which has proved incorrect in practice. The normative function of the state today is divided between the legislature and the executive, but in some systems the primacy of the executive in the legislative process is noticeable. In all forms of government, presidential, parliamentary, semi-presidential, the executive has gained enormous importance in performing all state functions. Its influence excercise through institutional mechanisms of cooperation between the legislature and the executive...