I'm watching Lost for the second time and every time I watch an episode with the entire plot in mind I can see how the purgatory theory is one of the ones that most fits in.
The basic idea is the following:
Everybody died in the plain crash and they were brought to the island because they all had something to complete before moving on. The Dharma Initiative was a group of scientist that somehow made it to the purgatory to be able to exploit its magic.
There are few things that matches with this theory, the main ones, I can come up with, are:
- People gets sick (like Ben) because that's not the place where they are supposed to be since they are alive.
- The healing capacities of the island (that healed John) is a metaphor of the fact that in a soul trip the body doesn't have to weight.
What are the main proofs of this theory and what are the main against it?