I think there is no single solution that can bring about peace in all parts of the world. In my view, however, there are some countries and international organizations that could make some things work towards peace.
Countries should resolve their differences through diplomacy and peaceful means, rather than resorting to violence and war. The problem is, disagreements often escalate into conflict. The source of conflicts is often poverty and inequality – these countries need assistance and support, which eventually would lead to a more stable and peaceful world.
International organizations, such as the United Nations, play a critical role in promoting peace and stability around the world. Strengthening these institutions and working through them could also help to address global challenges and reduce the risk of conflict.
Ensuring that all individuals are treated with dignity and respect and that their basic human rights are protected could create a more just and peaceful world. Another important factor is education. Educating people about conflict resolution, human rights, and other important issues could promote understanding and tolerance, and reduce the likelihood of violent conflicts.
Disarmament and arms control should also be taken into account: reducing the number of weapons and munitions in circulation could lower the risk of conflicts and reduce the impact of any that do occur.
The more measures are taken among the above, the more chance there is for a more peaceful world. The question is will these things be ever carried out?