Game theory enables rational insight into the basic principles of social interaction and has therefore become indispensable for economic and social sciences. Whether in politics, sports or medicine, modelling problems as a strategic game helps in decision-making in a variety of fields. With lecture snippets of Reinhard Selten, Robert Aumann and Alvin Roth, this Mini Lecture introduces to the mathematical beginnings of game theory, its socioscientific development and entrepreneurial integration.