Board Thread:Naruto Discussions/@comment-26006790-20140725193452/@comment-25228549-20140726145922

And about his motives, he originally wanted to remake the Shinobi System as he saw fit through violence. Now he wants to become Hokage (Thus, stealing Naruto's thunder) and change the world that way.

So that what happened to the Uchiha and what they made Itachi do never happens again.