I understood that the allegory
>>4 of this movie touch a lot of topics... but I don't think about reincarnation
>>9 'cause every character has is own personality, there's a chain, but they are different entities.
The entire movie is about the condemnation of these topics:
"The Pacific Journal of Adam Ewing" (1849) - racism
"Letters from Zedelghem" (1936) - homophobia
"Half-Lives: The First Luisa Rey Mystery" (1973) - pollution and political corruption
"The Ghastly Ordeal of Timothy Cavendish" (2012) - abusive nursing homes
"An Orison of Sonmi~451" (2144) - recycle of proteins for masses
"Sloosha's Crossin' an' Ev'rythin' After" (2321) - blind-believing
Of course this is just my opinion ⌒.⌒
...sorry, but my english is a little bad and I explained at my best ^~^'