The final chapter of this book summarizes the main insights from previous chapters and tests whether our approach is also applicable at an international level. Our international outlook shows that the five survey items, which capture more than three quarters of Austrian greenhouse gas (GHG) emissions, also work well in other European countries. Similarly, the lifestyles identified in Chap. 10.1007/978-3-030-85796-7_6 are also present in other societies. Furthermore, this chapter shows that the prevalence of these lifestyles as well as the explanatory power of the models correlate with societal factors such as political institutions, affluence, environmental degradation, and socio-demographic characteristics. The final chapter closes with a brief consideration of the impact of the COVID-19 pandemic on environmental attitudes and individual willingness to make sacrifices for the environment.