Is strategic thinking confined to battlefield? Or is it an important part of our everyday lives? The seminar in strategic interaction and decision-making will show the omnipresence of strategic deliberation. We will get acquainted with an approach known in economics as well as other social sciences as "game theory". It will allow us to see the behavior of rational agents like firms, political parties and (at least sometimes) also ourselves from a new angle. Despite the name of the seminar, our interest in games and strategies will not be just theoretical.