I could be wrong, but I think that the entire world subscribes to either Conspiracy Theory A or Conspiracy Theory B.
A. The worldly powers-that-be have conspired to reset the world’s calendar years based on the birth of a fictitious god that supposedly came to save the world.
B. Satan is working overtime through compromised and greedy people to divide the population, cause fear, cause anger, and cause hopelessness because these are the opposite of Love, the power by which God has already offered the world immortality (interestingly, about 2000 years ago).