We’ll never know what caused the Sudden Departure, the instantaneous disappearance of 2 percent of the world’s population at the center of HBO’s critically acclaimed drama The Leftovers. Series co-creator Damon Lindelof has said so, repeatedly, and if anyone knows the danger of promising answers he’s in no position to deliver, it’s the guy who did Lost. It’s a smart move, too. By taking “What happened?” off the table, it leaves the show free to explore a far more open-ended and rewarding question: “What happens next?”
But here’s the thing. We in the audience may know that the Sudden Departure will always be an unsolved mystery, but the people in the world of the show itself sure don’t. Much of The Leftovers is driven by the theories, belief systems, religious doctrines, mystical mumbo-jumbo, and out-and-out nihilism embraced by its various characters to explain the world-changing event and give life meaning afterward. Below, you’ll find the major schools of thought through which the people of The Leftovers attempt to understand their weird world.