In recent years, the emergence of low Earth orbit (LEO) mega-constellations has reshaped the strategic landscape of outer space. These large-scale satellite infrastructures are not only technological innovations but also instruments of economic influence, digital sovereignty, and geopolitical power. This thesis investigates how major global powers, the United States, China, Russia, and the European Union, have responded to the rise of LEO mega-constellations. The research introduces a framework based on two structural variables: the political regime type (democratic vs. authoritarian) and the level of market development (high vs. low). These variables are used to predict national strategies in space, resulting in a matrix of four ideal types: private sector leadership, development guidance, development collaboration, and development denial.