Disbelief is when someone doesn't believe in something, usually something that has to do with religion, science, or another kind of idea. Throughout history, different people have not believed in different things.
In early times, many people believed in different gods or goddesses and had various beliefs about how the world works. But as time passed, people began to challenge those beliefs and to look for explanations in science and to think about things with a more logical approach. This is called the Age of Enlightenment, and it started in Europe during the seventeenth and eighteenth centuries.
At this time, many people began to doubt or disbelieve religious beliefs. They looked at the world and used reason to come up with explanations that didn't involve gods or goddesses. They developed theories in fields like astronomy, physics, and biology. They studied history and psychology and made discoveries that challenged religious beliefs.
People still continue to reject certain beliefs today. Some don't believe in religion, while others take a scientific perspective and don't believe in theories that have not been proven or are not widely accepted. Disbelief is a part of human history, and it can lead to new ways of thinking and understanding.