I'm not sure that everyone needs more peace. Only people who are busy with their minds need it.

Right or wrong, people who're mostly unattached to their thoughts or the conditions of their surroundings, are mostly at peace, assuming that they aren't suffering from painful physical conditions, but even this can be overcome by dissociation.

Some of the most peaceful people, the average person might consider to be mentally insane/ unstable, and perhaps many, or even all of them, are, but one thing is for certain, they're experience of life is far more enjoyable than it is for that "average person". They're content, as they have no search to endure or desire to quench. This is the description of fearlessness or "true (psychological) freedom" - no "ruler" (authority) to fear and no wants (desires) to be threatened by - it is, in fact, "resting in peace".

Of course, it's also to fully lose one's mind - release of identity from a unique personality and mental habits, so as not to be ruled by a sense of personal responsibility (the sense of "doership", or "freewill", and the arising sense of guilt from outward/ inward focused judgments) or anxiety about the future.