Current theories of modernity, an international phenomenon, have been criticized for being Eurocentric, and attempts to address their problem of Eurocentrism are at best semi-Eurocentric. This thesis suggests a new theory of modernity, the Theory of Transhistorical Modernity (TTM), that is arguably more empirically robust and, being non-ethnocentric and cosmopolitan, normatively sounder. Taking an interdisciplinary approach, this theory is underpinned by a rethinking of the dichotomies of tradition/modernity, religion/secularity, and collectivism/individualism. This thesis takes a historical–sociological International Relations approach to the study of modernity, employing the comparative historical methods for data collection and analysis....