The following message suggests that anyone who wants to can participate in spending one minute at a prescribed time praying for peace. The word 'prayer' tends to make me think of people sitting in church saying Hail Mary's! Even though I know differently, we do have these automatic responses to certain words, especially when they have an emotional connection to childhood.
I would replace the idea of 'prayer' with whatever suits you. It might be just holding a feeling inside of harmony and peace...and that would be more than enough of a 'prayer'. In fact, focusing on war and 'praying' for it to stop would only be focusing on a negative image. The point is to bring into your consciousness a strong feeling of peacefulness, so that can radiate out to the Universe.
So, if you're interested, whatever works for you is best, and not just thinking it, but really experiencing it inside of yourself, will benefit you as well. Knowing that there are many other people doing the same thing at the same time...there is a great feeling of connectedness in that.
In WWII, there was an advisor to Prime Minister Churchill who organized a group of people who dropped what they were doing every night at a prescribed hour, for one minute, to collectively pray for the safety of England, its people and peace. This had an amazing effect, as bombing stopped.
There is now a group of people organizing the same thing here in America. If you would like to participate, each evening at 9:00 PM Eastern time (8 PM Central, 7 PM Mountain, 6 PM Pacific), stop whatever you are doing and spend one minute praying for peace in the world. If you know anyone who would like to participate, please pass this along. Someone said if people really understood the full extent of the power we have available through prayer, we might be speechless. Our prayers are the most powerful asset we have.