I was looking through the web and discovered that the practice began with the Celtic tradition of celebrating the end of the year by dressing up as evil spirits. The Celts believed that, as we moved from one year to the next, the dead and the living would overlap, and demons would roam the earth again. So dressing up as demons was a defense mechanism. If you encountered a real demon roaming the Earth, they would think you were one of them.
Let's go a bit further in the future to when the Catholic Church was taking everybody’s holidays and trying to convert them. They turned the demon dress-up party into “All Hallows Eve,” “All Soul’s Day,” and “All Saints Day” …show more content…
This was called “souling” and the children were called “souliers”.
You might think that this practice, then simply migrated along with Europeans to the United States. But trick or treating didn’t re-emerge until the 1920s and 1930s. It paused for a bit during World War II because of sugar rations, and it’s now back in full force.
The term “trick or treat” dates back to 1927.
Hallowe’en provided an opportunity for real strange fun. No real damage was done except to the temper of some people who had to hunt for wagon wheels, gates, wagons, barrels, etc., much of which decorated the front street. The youthful tormentors were at back door and front demanding edible plunder by the word “trick or treat” to which the inmates gladly responded and sent the robbers away