Problems of moral and ethical choice between Good and Evil face each of us every day. It is necessary to be able to make decisions both in a store where you were given extra change and when saving the lives of entire states. They are often accepted on the basis of feelings, emotions, or not always correct personal experience, which is fraught with errors. Finding the truth requires a scientific approach. This book, using simple examples accessible to everyone, will explain the essence of the concepts of Good and Evil based on logical thinking, knowledge and long-term study of real life situations. And the icing on the cake will be the solution to the famous “trolley” problem and its variations. The ability to understand such complex issues will help you find harmony in life and become happy.