Political differences in the UK are often drawn along party lines; the Tories believe this, Labour believe that and the Lib Dems believe that other thing. In many ways, that's the most simple way of aligning the policies and traditional values of the British political system.
Each party, however, has its own internal differences, clashes of traditions and values which simmer away beneath the surface of every party, whether in opposition or in government. Often these tensions remain unseen by those outside of the Westminster bubble unless they take on a level of severity; the unravelling of the Labour Party and the Brown/Blair fiasco being a classic example of internal party disagreements spilling over dramatically into the national sphere.
Within the Conservative Party at the moment, the crisis in the eurozone is threatening to cause a lot of in-party tension. Many Tories - often those with more traditional values - are speaking up over their fears of Britain's membership of the EU.
The recent increase in the volume from these Conservative MPs - voices such as Douglas Carswell, Zac Goldsmith, Peter Bone, MEP Danial Hannan and most notably Foreign Secretary William Hague - should not be ignored.
Whilst they are not by any means threatening David Cameron's leadership of the party, these voices should be a concern for the Tory party leadership. Those who have been in politics for a long time will know that often, those that pose the most threat are found within your own walls; they have much more sway and more power to bring you down.
In an ideal world - one where the Conservatives won an outright majority in 2010 - David Cameron may have taken a stronger line on Britain and Europe. However, as Tory MPs were keen to remind the media during their party conference last week, they are part of a Coalition Government and have to, as a result, make compromises.
This may be a comfortable excuse to wheel out to the press, and it may to some extent subdue voters who have strong feelings on Europe. It is, however, the members of the party with whom such arguments will not wash.
Ironically, whilst the eurozone crisis is dominating the media to the extent which it is at the moment, these issues will most likely simmer away beneath the surface. Whilst those with doubts will speak their mind to a certain extent, they are also aware that being too outspoken would endanger not only themselves but their party as well. And seeing as how the only way they will ever be able to change Britain's relationship with Europe is to have an outright Tory government, it is in their favour not to bring down the Coalition.
The Prime Minister and the Conservative Party must - and rightly seem to be - focus on helping resolve the euro crisis. The argument that a stable eurozone is in Britain's favour may be mocked by some on the left, but it is true that if the eurozone collapses Britain's economy will suffer.
But as well as looking far away to the crisis on the continent, Cameron and his team must also keep a close eye on the crisis on his backbenches. If he fails to do so, the Europe issue could become a long-running saga which has the potential to drag the Conservative Party down.