What is the difference between the two? A lot of the time it seems people think the only difference is that SHTF will only last so long, where as TEOTWAWKI will be indefinite. And does TEOTWAWKI Have to reduce us back to the stone age, like is commonly believed? Or is TEOTWAWKI just a certain amount of S hitting the fan? Like when the US economy collapses that would be SHTF, but if the world's economy collapsed that would be TEOTWAWKI? I guess I'm just confused because some people seem to use them interchangeably.