This article aims to present when and how the industrial-military complex and the war economy were born and structured in the great capitalist powers and demonstrate the imperative need for both to be brought to an end in the world so that world peace can exist. It can be said that the great capitalist powers, having war industries, sponsor the arms race and the maintenance of permanently organized armies divorced from civil society and at the same time leading to the radical subversion of the economy and society. The large military-industrial complex detached from civil society requires the proliferation of wars and the adoption of a permanent war economy. One fact is evident: peace will never be built in the world with the existence of the military-industrial complex and the war economy, especially in the great capitalist powers. This is why the end of the military-industrial complex and the war economy in the world becomes imperative. This means that, for peace to exist in the world, there must be an end to the military-industrial complex and the war economy. For there to be peace in the world, there must be world disarmament. For peace to exist in the world, would the holders of political and economic power in the great capitalist powers accept global disarmament? Would the war industry leaders and lobby accept the end of the war economy? No is the answer to these two questions. This means that humanity is facing an impasse that is difficult to overcome, which is to disarm the warmongers and bring the war economy to an end to make world peace prevail.