Maybe I'm too pessimistic, but no it is not at all. Literally every plan to achieve something is tainted by the perception of the one making the plan. So he/she will naturally not take every possible human reaction into account.

So without a forceful silencing of those who oppose world peace it is not possible. It is against human nature even, because almost everyone is susceptibal to corruption of mind.

While it is a nice thought, it will always fail because not all humans are going to align.