Prime Minister. President of the Cabinet. President of the parliamentary group of the governing party. Coordinator of the government structure. Resolver of internal government and intra-party disputes. Guarantor of the coherence of the government mechanism. These are just a few of the descriptions that the respective Prime Minister receives in modern governance. But what is his main role? What means does he have at his disposal? Where does his dominant position in our political system come from? And with whom does he share and at the same time establish it? All the above questions are answered in the pages of this book.