What Does “Post-Christian World” Mean? Another book is published expressing the opinion that Christians now must learn to live in a “post-Christian world.” A friend asks me if there can be such a thing as a post-Christian world. Here is my answer. It depends. We certainly do not live in a world without Christianity. But “Christendom” is quickly disappearing from places where it once existed. “Christendom” is a culture in which Christianity functions as the “glue” that holds people together.... Read more