The Walking Dead: 8 Crazy Theories For How It All Started

2. Terrorist Attack

Chemical weapons have long been a controversial subject, with various reports of testing around the world. They're a severe threat, of course, and in the wrong hands they could be utterly horrifying. I'll let you discuss who you could define as the 'wrong hands' in today's world... But imagine a terror cell hell-bent on crippling the western world, surely the more powerful a weapon they have, they better for their cause. Unleashing a weapon of carnage on American soil could've escalated into something they themselves could not have anticipated. It would be almost impossible to prove the definitive cause in The Walking Dead at this stage, unless they found documents from the time of the 'attack'. Being close to Washington D.C. they're well placed.