Historically affirming certain post-WWII constructive theologians and social theorists, After Christendom unpacks theological anomalies negatively denying the science underlying global warming, wedge issues supporting systemic racism, and certain erroneous decisions made by mainline churches and the evangelical movement. Anomalies occur when something taken for granted no longer fits current situations. The so-called mainline church and the evangelical movement have not addressed or reconstructed their theological anomalies. Caught inside cultural accommodation, the more liberal mainline church often does not recognize its historical tie to a pre-modern God, a transactional definition of the crucifixion, and Jesus' consignment to the cross. A companion argument suggests that the evangelical movement's inability to respond to the pre-modern depiction of God as an omnipotent, theocratic King helped provide sufficient votes for Trump's successful presidential run. Both groups inability to face such theological anomalies rests within a belief in conservative originalism, an unwillingness to move beyond European Christendom's earliest theological constructions. After Christendom will be of particular interest to seminary, divinity school, university, and college libraries, as well as seminary students and professors, members of college and university departments of religion, history, and political science, and ministers and church leaders.