People wage wars. Whether they use governments, corporations, churches, or other vehicles to do so is a matter of convenience and what is available -- all have been used. If you shift more power to governments, governments will more often be the choice. If you shift that power away from governments, other choices will take over.
"Peace is not a relationship of nations. It is a condition of mind brought about by a serenity of soul. Peace is not merely the absence of war. It is also a state of mind. Lasting peace can come only to peaceful people." -- Jawaharial Nehru
People wage wars. Whether they use governments, corporations, churches, or other vehicles to do so is a matter of convenience and what is available -- all have been used. If you shift more power to governments, governments will more often be the choice. If you shift that power away from governments, other choices will take over.