The subject provides the student with introduction into the theory of risks, respectively safety, dangers, threats, vulnerabilities and tools of their study and management. It contains basic concepts of safety and danger, different types of risks, their perception and management, the evolution of the meaning of these concepts over time, socio-cultural, socio-economic and natural-sciences based context. It emphasizes social sciences in cyndinique (scince of danger), e.g. ethics in the area of danger and its management and decision-making processes. It represents a systematic and systemic approach to addressing safety, general rules of its instruments and methods of study with a focus on physical and chemical disciplines. It emphasizes modern techniques such as multi-hazard approach, risk trade-off and resilience. It presents the relationships of scientific disciplines in a comprehensive concept of security, the importance of natural, social and technical sciences in understanding and managing risks.