LOST Theories (will have spoliers)

[Jeritron]

Originally Posted by Hanso I have never believed the bomb theory, since it alters things much farther back than the crash. Jack has a 14 year old son for christ sakes. Where did he come from? I still think that they will say the Nuke got everyone back to the right time, and thats it. I bet they throw all kinds of new shit at us next week. Lost doesnt care about answering old questions.

The bomb that set the alternate universe into motion detonated in 1977. Jack's son was presumably born somewhere around 1990.

They also address the island being destroyed, by showing it at the bottom of the ocean. The statue is still there, the Dharma initiative is still there, etc.
That's because those things were built before 1977. It's on the bottom of the ocean from 1977 onwards though.

The only people who would have been on the island at that time are Ben Linus, and his father. It's specifically addressed though, that Roger Linus was a workman for the DI on the island, with Ben, but he decided to leave his job.
They returned back to the mainland before the bomb went off, which is when the alternate reality began to unfold.