Halloween in the early 20th century was known as a day of pranks, and with the onset of the Great Depression, these once-harmless tricks led to serious destruction. While trick-or-treating and candy have been a duo for decades, the sweets were also once used as a tool to denounce juvenile artifice and promote innocent communion, and in the 1950s, the growing message from candy companies was, "If you buy the right candy, you won't get tricked."