The book Constitutionalism in Anglo-Saxon countries is the result of the conference that took place at the Jagiellonian University in May 2012. The notion of constitutionalism as expressed in conference title is understood broadly, encompassing both normative and institutional dimension of constitutional government as well as their scholarship understanding. One of the reason for studying Anglo-Saxon constitutionalism is undoubtedly high esteem in which countries belonging to this cultural area are held. International position as well as high level of civilizational development of the United States, United Kingdom, Canada, Australia or New Zealand tend to increase the attractiveness of their institutions and constitutional regulations. Important motive which dictates close interest in different aspects of Anglo-Saxon constitutionalism is its global influence. This results directly from the fact that English-speaking countries can be found in nearly every inhabited part of the world. Influencing only their nearest neighborhood they are able to achieve global dimension in this respect, including at least Europe, North America and Australia and Oceania. Gaining influence comes easier if ones takes into account how appreciated are their constitutional systems for pragmatism, regulations based on common sense and reasonable and informal procedures. It should be mentioned that described above process of, so to speak “constitutional spreading”, takes place in times of globalization resulting in growing mutual interactions between countries and legal and constitutional cultures.