To put it plainly: Juliet is the reason Juliet was recruited by the Others to come to the island.
Like the "chicken or the egg" issue with the compass, Juliet setting off that hydrogen bomb started the chain of events that would lead her to the island circa 2001. Hydrogen bombs release radiation. Radiation wreaks havoc on a woman's reproductive system (hence the "old-looking" x-rays Alpert shows Juliet when trying to recruit her as well as the difficulty Juliet's siter had in getting pregnant following radiation for cancer treatment), often making it impossible to conceive or carry a child to term. [As a side note, this may explain why most people don't get cancer on the island and Rose's cancer was cured.]
So, Juliet comes to the island to try to fix the problem, can't, then is transported to the 1970s and carries out the exact act that was her impetus for being on the island in the first place. It's quite an ironic circle.
Like the "chicken or the egg" issue with the compass, Juliet setting off that hydrogen bomb started the chain of events that would lead her to the island circa 2001. Hydrogen bombs release radiation. Radiation wreaks havoc on a woman's reproductive system (hence the "old-looking" x-rays Alpert shows Juliet when trying to recruit her as well as the difficulty Juliet's siter had in getting pregnant following radiation for cancer treatment), often making it impossible to conceive or carry a child to term. [As a side note, this may explain why most people don't get cancer on the island and Rose's cancer was cured.]
So, Juliet comes to the island to try to fix the problem, can't, then is transported to the 1970s and carries out the exact act that was her impetus for being on the island in the first place. It's quite an ironic circle.
