This book examines the profound transformation that has occurred in Ukrainian society as a result of Russia's large-scale invasion of Ukraine on February 24th, 2022. The authors—two renowned sociologists and directors of the Kyiv International Institute of Sociology—document and explain the post-Soviet evolution of Ukrainians' views, values, and behavior. Utilizing data from hundreds of opinion surveys from 1991 to 2023, they analyze how the war affected the formation of Ukrainian national identity, geopolitical orientations, society's readiness to resist, attitudes towards the state and its institutions, as well as other aspects. This timely study highlights socio-economic transitions, migration moods, the moral-psychological state of the population as well as the changing media and Internet consumption among Ukrainians. It also examines the thorny issue of possible social tension that may arise in post-war Ukraine. The volume is not only an invaluable source of public opinion data, but also constitutes a basis for further analysis of the post-war reality. It offers an essential tool for understanding the challenges and opportunities facing Ukraine on its path to recovery and development. Most of the data from the studies used have been transferred to the National Data Bank "Kyiv Archive", which provides scholars with the opportunity to conduct more detailed research.