You choose peace for your heart. You only have power over your own thoughts and actions. With enough people choosing peace, with each one raising their own vibration, you will reach a critical mass that has the power to lift man to a more peaceful place.
The vibration will be high enough for man as a species to be able to make peaceful choices. This doesn’t mean that everybody thinks the same; it means that at least peace is possible. With that mentality, there will be limitless possibilities for reconciliation and coexistence in your world.