Economics is a thoroughly interesting science. It provides insights into the political actions of the government, shows when the economy is growing (expansion) or declining (recession), offers scientifically grounded answers, and explains the reasons behind them. It highlights why wages in Germany have not increased for over a decade while prices have risen significantly. Additionally, it explains why jobs have become insecure today and why there are so many unemployed individuals. This book answers these questions. It addresses you as if you were sitting in my seminar. In this book, I first present the theories and then discuss each one with you, as a fictional participant, comparing them to the current political and economic reality. This book reveals the mistakes made by politicians.