We encounter the topic of security/insecurity time and again: in news reports, as participants in road traffic or in the prospects for pensions and care in old age. The lecture series in the summer semester 2026 will be dedicated to everyday and not always visible issues of insecurity in everyday life: Forms of violence in partnerships, insecurities about one's own self, structures of security by the fire department and THW, cyber security of infrastructures and more. Speakers from research, teaching and practice will provide insights into these and other topics.