Generate text that refutes this claim: Neo-functionalism explains the cause of integration  Spill-over is the following concept – in order to enjoy the full benefits of integration of the first sector you need to integrate the related sectors. An example of this is the ECSC (European Coal and Steel Community) evolving into other energy sectors and forming Euratom. There are three types of spill-over – functional spill-over, political spill-over and cultivated spill-over. Firstly, functional spill-over, which regards spill-over in an economic context. For example, this might involve integrating coal and steel, then integrating transport systems so that coal and steel are moved around more easily. Secondly, there is Political spill-over, where political actors shift their allegiance to a new centre, for example from the national parliament to Brussels. Thirdly, there is cultivated spill-over, which is the idea that institutions drive further integration by being in practice; for example the European Commission’s growing autonomy. [1]  [1] Tranholm-Mikkelsen, Jeppe "Neo-functionalism: Obstinate or Obsolete? A Reappraisal in the Light of the New Dynamism of the EC Millennium - Journal of International Studies, Vol. 20, No. 1, pp.1-22,
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The counter theory to spill-over is the logic of diversity. Neo-functionalism is flawed as it assumes that integration in low politics (economic) will lead to integration in areas of high politics. This is not possible as issues of high politics are integral to the national interest; so integration will only be possible when national interests coincide, which is possible but unlikely. Neo-functionalism believes areas of high politics can be cultivated into integration, whereas intergovernmentalism believes that the fate of the nation-state should never be subject to the decisions of others.