Peace is not an end. It can never come about through non-peaceful means. Most important is to become nonviolence, so that when a situation presents itself, we will not create more suffering. To practice nonviolence, we need gentleness, loving kindness, compassion, joy, and equanimity directed to our bodies, our feelings, and other people. There are techniques for doing this.
Conscious breathing is one.
If we are still upset, we can go for walking meditation, mindful of each slow step and each breath we take. By cultivating peace within, we bring about peace in society. It depends on us. To practice peace in ourselves is to minimize the numbers of wars between this and that feeling, or this and that perception, and we can then have real peace with others as well, including the members of our own family. The answer depends on your state of being.