The book provides the main principles of Nation-State Building. It explores the applications of these principles to many states, including Poland, South-Africa, Bosnia and Herzegovina, as well as Iraq. It also gives insight on the role of the US-led coalition in Iraq after the fall of Saddam’s Regime in 2003. It covers the fields Political System, Legislation and Judiciary System, New Constitution, and Security. The author employed additional research methods to provide a deep understanding of the political situation following the changes of regime, including interviews and surveys, namely in Iraq. Finally, the book provides a method of evaluating the success or failure of the Nation-Building process of other nations by using the main principal rules of Nation-Building theories.