This study aims to address the trends of judicial review of legislation, in view of contemporary issues of Constitutional Law. The scientifical investigation is geared to detect the shared practices by the constitutional courts, meanwhile it establishes the points of divergence between those courts. In fact, the work focuses on the area of concentration of the judicial review in democratic legal systems and, more particularly, in the line of research on the globalization of the constitutional decision-making process. The research is organized into five chapters, each of them discussing the mentioned trends, such as the rational justification for the internationalization of the decision fundamentals. The most important results will undoubtedly be related to the role of contemporary judicial review of legislation in safeguarding democracy, protecting and promoting civil rights.