How Halloween evolved from its pagan roots to a day for people to try out new identities

“IT’S ALIVE!” DR. FRANKENSTEIN cried as his creation stirred to life. But the creature had a life of its own, eventually escaping its creator’s control.

Much like Frankenstein’s monster, traditions are also alive, which means they can change over time or get reinvented. Built from a hodgepodge of diverse parts, Halloween is one such tradition that has been continually reinvented since its ancient origins as a Celtic pagan ceremony. Yet beneath the superhero costumes and bags of candy still beats the heart of the original.