Iran and nuclear enrichment

So the list of countries with declared nuclear weapons are the US, Russia, UK, France, China, India, Pakistan, and North Korea (questionable). Other countries with known nuclear capability are Canada, Germany, Japan, Italy, Lithuania, and the Netherlands. Now Iran jumps into the picture and the US isn't very happy. We should keep in mind that although there might be an uproar against Iran's technological advancement we should be mindful that this type of rhetoric might be contrary to developing a long term relationship with the Middle East. Will further progress in Iran's nuclear program result in the eventual reduced dependency on its own oil supply? Will this potential scenario lead to an increased oil supply, therefore lower prices at the pump? Regardless of the impact, it is difficult to imagine a world that is being pushed towards operating a free market economy yet be limited in its capability of maximizing its own markets. Eventually all peoples (as opposed to nations) will achieve space flight, nuclear capability, and other major technological breakthroughs, although it is simply a matter of how soon it will happen. Current attempts to hinder such progress might be good for short term security, but it will alienate us from future discussions related to the economic development of non-Western countries or those with opposing values.