The Butterfly Effect

[Rodri]

The multiverse cancels out the grandfather paradox.
In your possible past, you did not go back and kill Rasputin because it never happened and so you will not do it in the future. Now, if you could cross dimensions to other possible futures, in many of them you do go back and kill Rasputin and that opens up a whole new set of variables and possible futures. Some of them may have resulted in the end of human conflict many years ago? Who knows?