The NeoConsevative mix of Democratic Peace Theory/Pax Americana/Military Industrial Complex as way of achieving world peace differs greatly from the ideas of Kant, pre-emptive wars which were seen under the Bush Doctrine to install a democracy have had mixed results and I would argue have not been worth the costs of bringing them into being.
John F Kennedy spoke against this Pax Americana in his American university commencement address in 1963 calling for a genuine peace based on mutual respect and strenghthening the United Nations into an effective tool for world peace with the US to lead by example:
"Let us focus instead on a more practical, more attainable peace, based not on a sudden revolution in human nature but on a gradual evolution in human institutions -- on a series of concrete actions and effective agreements which are in the interest of all concerned. There is no single, simple key to this peace; no grand or magic formula to be adopted by one or two powers. Genuine peace must be the product of many nations, the sum of many acts. It must be dynamic, not static, changing to meet the challenge of each new generation. For peace is a process -- a way of solving problems.
With such a peace, there will still be quarrels and conflicting interests, as there are within families and nations. World peace, like community peace, does not require that each man love his neighbor, it requires only that they live together in mutual tolerance, submitting their disputes to a just and peaceful settlement. And history teaches us that enmities between nations, as between individuals, do not last forever. However fixed our likes and dislikes may seem, the tide of time and events will often bring surprising changes in the relations between nations and neighbors. So let us persevere. Peace need not be impracticable, and war need not be inevitable. By defining our goal more clearly, by making it seem more manageable and less remote, we can help all people to see it, to draw hope from it, and to move irresistibly towards it."
Dwight Eisenhower also critcised this militarstic war thirst way of achieving peace:
"Down the long lane of the history yet to be written America knows that this world of ours, ever growing smaller, must avoid becoming a community of dreadful fear and hate, and be instead, a proud confederation of mutual trust and respect.
Such a confederation must be one of equals. The weakest must come to the conference table with the same confidence as do we, protected as we are by our moral, economic, and military strength. That table, though scarred by many past frustrations, cannot be abandoned for the certain agony of the battlefield.
Disarmament, with mutual honor and confidence, is a continuing imperative. Together we must learn how to compose differences, not with arms, but with intellect and decent purpose. Because this need is so sharp and apparent I confess that I lay down my official responsibilities in this field with a definite sense of disappointment."
Instead Neoconservatives believe in starting wars in the hope of changing the world map to suit their goals. They also show a lack of concern with international consensus through organizations such as the United Nations. "it is a distinct political movement that emphasizes the blending of military power with Wilsonian idealism"
"Neoconservatism holds the domestic and international sphere to a clear moral and ideological standard and champions the use of militarism to further that standard globally. It does not ignore soft power issues, but rather, “when your only tool is a hammer, all problems look like nails” (Fukuyama 2006: 63).
"Neoconservatism did not accurately perceive American military power, the power of democratisation, or the failure of the world’s population to accept its ideological persuasion in the midst of convincing evidence to the contrary, particularly as things turned sour in Iraq. It seems that far from playing the final act in the end of history, the neoconservative persuasion has caused a crisis of legitimacy in the global system. American power is no longer seen as legitimate by many."
Neoconservatism and American Foreign Policy
