What is "postchristianity"

Postchristianity is the loss of the primacy of the Christian worldview in political affairs, especially in the Global North where Christianity had previously flourished, in favor of alternative worldviews such as secularism or nationalism. It includes personal world views, ideologies, religious movements or societies that are no longer rooted in the language and assumptions of Christianity, at least explicitly, although they had previously been in an environment of ubiquitous Christianity (i.e. Christendom).

Other scholars have disputed the global decline of Christianity, and instead hypothesized of an evolution of Christianity which allows it to not only survive, but actively expand its influence in contemporary societies.