The political significance of masses is more obvious than ever. The aim of this article is to develop a conceptualization capable of capturing the dangerous as well as promising aspects of masses. It argues that, intricately, the dangers and fruitful potentials of masses are born out of the same fundamental structural features. We may differentiate analytically between different kinds of masses, but all masses contain elements of ambiguity. The mass conceptualization developed builds on a critical, deconstructing interpretation of selected Bataille (...) texts centering on ontological features of individuality and collectivity. Especially, Bataille’s concepts of ‘myth’ and ‘sacrifice’ are accentuated and critically transformed. Contemporary examples of masses – right-wing anti-establishment movements, Occupy Wall Street and Black Lives Matter – are presented and reflected through the prism of sacrifice, with the aim of highlighting the multifaceted and complex nature of the dynamics of masses. (shrink)