obviously madara,a world of winners he says eh,it's just some lame excuse to control the world
Madara
madara cause he wants to be control of it.
Madara will cast it, he just did it at the lates manga
in the last ch.610 obito said that he want to start the infinite tsukuyomi right away..does it mean the he will be the one who will cast the infinite tsukuyomi and not madara?Obito will probably die.. While Madara will cast it after his death