The purpose of this essay is that through idea analysis and ideal types examines if the EU changed the kind of peace they seek to promote to confirm or falsify Magnus Jernecks thesis that the meaning of peace change depend on the context. I will be making two comparison points, the first at the peace projects start in the European Coal and Steel Community (ECSC) and the second in the European Neighbourhood Policy (ENP). My ideal types that I have chosen are the idealistic perspective of peace, the justice peace perspective and the perspective of balance of power which has constituted a main line when it comes to issues of war and peace. My research question is linked to my ideal types and reads - is the peace that ECSC and ENP promote: 1) a peace of the idealistic perspective, 2) a peace of the justice perspective, 3) a peace of the balance of power perspective. I seek the answer of these questions in two types of documents. The Schuman declaration which is directed to answer the question ECSC and the report Wider Europe – Neighbourhood: a new framework for relations with our Eastern and Southern neighbors which is directed to answer the question ENP. The results of the study shows that the EU was intended to promote a different kind of peace within the ECSC than the ENP. The ECSC seek to promote a peace of justice and a peace of the balance of power perspective. With ENP they seek to promote a peace of justice and the idealistic peace perspective. This can give a result that EU loses its trustworthiness as a peace-builder if one is not clear when this change occurs.